裂隙粘土渗透性和敏感性研究

Research on Permeability and Sensibility of Fissured Clay

裂隙粘土在我国广为分布,对该类土体渗透系数的测定方法主要为传统方法,但传统方法往往耗费大量的人力和时间,采用微水冲击试验却能很好的解决这些问题,分析传统方法与微水冲击试验所得结果的差别,指出不同方法研究该结构性粘土渗透特性的优缺点和工程适用性。通过分析和比较室内不同扰动情况土样试验测定结果,给出了裂隙粘土敏感性评价的指标。

The fissured clay is widely distributed in China, but the ways to determine the permeability coefficient of this soil are mainly traditional methods, which would tend to spend a lot of manpower and time. The slugging test is adopted to solve these problems and obtain the accurate permeability coefficient, then compared with the advantages and disadvan- tages of using different two methods, the structural clay permeability and their engineering applicability are pointed out. By analyzing and contrasting the experimental results in laboratory for the soil samples under different disturbances, the index to evaluate the sensitivity of fissured clay is defined.