滇池泥炭土物理力学指标统计特性研究

发布时间：2018-09-10 11:00

【摘要】：通过搜集数个典型场地的地质勘查数据,系统分析了滇池泥炭土时空分布特征及物理力学指标间的统计特性关系,重点分析了有机质含量及其组分特征对于泥炭土工程特性的影响。结果表明:(1)滇池泥炭土埋深在3.6~10 m之间,厚度变化范围为2.3~7.3 m。该区域泥炭土多属于高分解度泥炭土,其有机质含量、孔隙比的分布范围为10.5%~84.1%、1.5~9.2,具有压缩性高,强度较低的特点;(2)通过对各物理力学指标进行回归分析发现,泥炭土含水率与孔隙比、压缩系数、抗剪强度呈线性正相关关系,而随着有机质含量的增加,孔隙比增大,天然重度减小,压缩性、抗剪强度增大;(3)相对于纤维泥炭土,滇池泥炭土由于分解度高,纤维含量较少,腐殖质颗粒较多,结构更加致密而具有更小的孔隙比、含水率以及较大的天然重度、颗粒比重。
[Abstract]:By collecting the geological exploration data of several typical sites, this paper systematically analyzes the spatial and temporal distribution characteristics of peat soil in Dianchi Lake and the statistical characteristic relationship between physical and mechanical indexes. The influence of organic matter content and its components on the engineering characteristics of peat soil is analyzed. The results are as follows: (1) the buried depth of peat soil in Dianchi Lake is between 3.6 and 10 m, and the thickness varies from 2.3 to 7.3 m. Most of the peat soils in this area belong to peat soil with high decomposition degree, and the distribution range of organic matter content and porosity ratio is 10.5% and 84.1%, 1.5% and 9.2%, which is characterized by high compressibility and low strength. (2) through regression analysis of various physical and mechanical indexes, it is found that, There is a linear positive correlation between water content of peat soil and porosity ratio, compression coefficient and shear strength, but with the increase of organic matter content, the porosity ratio increases, the natural severe degree decreases, the compressibility and shear strength increase. (3) relative to fiber peat soil, Because of the high decomposition degree, less fiber content, more humus particles, denser structure and smaller porosity ratio, water content, natural gravity and particle specific gravity of the peat soil in Dianchi Lake.
【作者单位】：中国有色金属工业昆明勘察设计研究院;昆明理工大学建筑工程学院;
【基金】：岩土力学与堤坝工程教育部重点实验室开放基金项目(GH201401)
【分类号】：TU447

【相似文献】