天津地区吹填淤泥非线性渗透特性试验研究

Experimental study on nonlinear characteristics of permeability of soft clay in the area of tianjin

采用GDS高级固结渗流仪对天津地区不同液限吹填淤泥开展了固结—渗透联合测试试验,通过试验得出了不同液限吹填淤泥的e-kv试验数据,基于试验数据对目前常见的4种非线性渗透模型进行拟合并测定了相关参数。结果表明,4种模型对天津地区吹填淤泥都是适用的,其中lge-lgk v模型拟合程度最好,参数简单,建议将其作为天津地区淤泥质吹填土等超软土大变形与非线性固结性状数值分析的最佳渗透模型。研究成果对该地区工程应用与后续研究具有重要意义。

Consolidation and permeability tests were conducted on soft clays of Tianjin with diferent liquid limit by GDS consolidation apparatus.Some fitting parameters were studied for 4 common nonlinear permeability models based on the test data.The obtained results indicate that:The four common nonlinear permeability models for soft clays are conformable with dredged fill in the area of Tianjin.Because of the characteristics by a simple form and best fitting,the lge-lgkv nonlinear permeability is considered as a preferred nonlinear permeability model in the numerical analysis of large-strain and nonlinear consolidation behaviors of dredged fill in Tianjin area.The results of this peper are of great importance to give a in reference to the practical engineering and the following researches in the area.