防灾减灾工程学报2017，Vol.37Issue(6)：945-950,6.DOI:10.13409/j.cnki.jdpme.2017.06.013
堆载吹填淤泥并同步真空预压地基固结解析分析
Analysis of Consolidation due to Preloading by Vacuum and Surcharge of Hydraulically-Filled Mud Subjected to Synchronous Vacuum-Preloading
摘要
Abstract
The synchronous vacuum preloading technique for treating soft ground and its overlying hydraulic surcharge fills is analyzed.The surcharge effect of hydraulically-filled mud is considered,involving the variations from linear increasing in surcharge with the process of hydraulic filling to non-linear exponential decreasing in surcharge with the process of vacuum preloading.The decrease in surcharge-induced stress with depth,as well as the smear effect due to installation of vertical drains,is also considered.Based on the equal strain assumption,explicit analytical solutions are derived for the excess pore-water pressure at any arbitrary point in soil and the overall average degree of consolidation of soft ground under simultaneously radial and vertical consolidation.The consolidation process of soft ground for a field test is calculated by using the proposed solutions.From a comparison of the calculated with measured results,it is found that the calculated results are consistent with the measured ones in terms of the tendency of the variation of the degree of consolidation with time.Thus it verifies the applicability of the proposed solution.Meanwhile,it is found that the horizontal hydraulic conductivity is a key parameter governing the precision of the calculated results.关键词
真空预压/堆载预压/吹填淤泥/固结/解析解Key words
vacuum preloading/surcharge preloading/hydraulic mud/consolidation/analytical solution分类
建筑与水利引用本文复制引用
付冠杰,雷国辉,范明桥,李杰,徐锴..堆载吹填淤泥并同步真空预压地基固结解析分析[J].防灾减灾工程学报,2017,37(6):945-950,6.基金项目
国家自然科学基金项目(51278171,51408381)、中央高校基本科研业务费专项(2015B06014,2015B25914)、水利部公益性行业科研专项经费项目(201401006,201501043)资助 （51278171,51408381）
