草炭土的分解度和有机质含量对其渗透性的影响研究

草炭土是一种性质极其特殊的腐殖质土，广泛分布在中国东北的季冻区沼泽湿地中，具有高有机质，低分解度，高含水率等特殊性质，同时也具有高压缩性，高孔隙比，高渗透性等不良工程地质性质。选取吉林省靖宇县龙泉镇原状草炭土为样本，对不同分解度和有机质含量的草炭土的渗透性进行了研究，分析比较试验数据。结果表明:草炭土的渗透性随分解度的增加而降低，随有机质的增加而增大。在有机质含量较低时，其对渗透性的影响不明显，但在有机质含量高于一定程度后，影响变得显著；而渗透性随着分解度增加而降低的趋势非常明显。

Study on Effect of Organic Matter Content and Decomposition Degree of Turfy Soil on Its Permeability

Turfy soil is a kind of humus soil with special properties and widely distributed in the marsh of seasonal frost area in the northeast of China. It is of high organic matter content, low decomposition degree and high water content, and also of undesirable engineering geological properties, such as high compressibility, high void ratio and high permeability. Herein, depending on undisturbed turfy soil sample in Longquan Town, Jingyu County, Jilin Province, and its properties, the permeability of turfy soil with different decomposition degree and organic matter content was studied, then the test data was analyzed and compared. The result shows that, the permeability of turfy soil decreases with increase of the decomposition degree, while increases with increase of the organic matter content; when the organic matter content is low, the effect on the permeability thereof is not obvious, however, when the content increases to certain extent, the effect becomes significant; the trend when the permeability decreases with the increase of decomposition degree, is quite clear.