吹填土区域软土地基固结特性

该文结合宝钢吹填土区域道路工程地基的应力历史和堆载预压施工监测结果,对浅层松散吹填土层和下部淤泥质软土层的固结变形规律进行分析.研究结果表明:该区域浅部吹填土层处于欠压密状态,在填土荷载作用下压缩变形发展很快,下部软土层吹填土和表层杂填土荷载引起的超孔压尚未完全消散,在地基加固施工时监测的初始孔压并非静止孔压；填土加载后,软土层的固结变形经历一个从快到慢,逐步收敛的过程.

Consolidation Characteristics of Soft Soil Foundation in Hydraulic Fill Area

The paper analyses the consolidation and deformation characteristics of dredger fill in the shallow layer and silt soft soil in the lower layer through specific evaluation of stress history and construction monitoring of heaped?preloading of a foundation,based on road project within a dredger fill area of Baoshan Iron & Steel Co.,Ltd..The analysis results indicate that the dredger fill in the shallow layer of this area is in the state of incomplete consolidation,which is able to achieve final compression deformation quickly under fill loading;Excess pore water pressure triggered by the dredger fill in the lower layer and the miscellaneous fill in the surface layer load is incompletely dissipated,hence,the initial pore pressure monitored is not the static pore pressure during the construction of foundation enhancement.The consolidation of soft soil layer under fill load goes through a process of fast?to?slow deformation and gradual convergence.