有机质含量对高分解度泥炭土工程性质的影响研究  

Study on the influence of organic matter content on the engineering properties of peat soil with high degree of decomposition

作　　者：杨必进 王立娜[1,2] 李育红 申显飞 韩嘉源 张连星 YANG Bijin;WANG Lina;LI Yuhong;SHEN Xianfei;HAN Jiayuan;ZHANG Lianxing(College of Architecture and Engineering,Yunnan Agricultural University,Kunming,Yunnan 650201,China;YCIH No.1 Engineering Survey and Design Company Limited,Kunming,Yunnan 650033,China)

机构地区：[1]云南农业大学建筑工程学院,云南昆明650201 [2]云南建投第一勘察设计有限公司,云南昆明650033

出　　处：《河北工业科技》2024年第6期426-433,共8页Hebei Journal of Industrial Science and Technology

基　　金：国家自然科学基金(52108346);云南省科技厅基础研究专项计划基金(202101AT070253);云南农业大学学生科技创新创业基金(2023Y0854)。

摘　　要：为探明泥炭土的物理力学性质与土中有机质含量的关系,按不同比例将高有机质含量的泥炭和低有机质含量的泥炭质土混合,获得不同有机质含量的泥炭土,分别进行基本物理力学性质试验,讨论了有机质含量对泥炭土物理性质、压缩特性、强度特征的影响。结果表明:泥炭土的液限、塑限和塑性指数与有机质含量呈明显正相关,土粒比重与有机质含量呈明显负相关;随着土中有机质含量的增加,压缩系数和压缩指数均增大,压缩模量减小;有机质含量对无侧限抗压强度和快剪强度的影响规律不一致,前者呈负相关,后者呈正相关;快剪强度指标中,黏聚力与有机质含量呈明显正相关,变化范围为1.58~27.68 kPa;内摩擦角与有机质含量基本呈负相关,变化范围为11.1°~12.3°。研究结果可为泥炭土地区的工程建设提供依据。To explore the relationship between the physical and mechanical properties of peat soil and the organic matter content in the soil,peat with high organic matter content and peat soil with low organic matter content were mixed in different proportions to obtain peat soil with different organic matter contents.Basic physical and mechanical property tests were conducted separately,and the influence of organic matter content on the physical properties,compression characteristics,and strength characteristics of peat soil was discussed.The experimental results show that the liquid limit,plastic limit,and plasticity index of peat soil are significantly positively correlated with organic matter content,while the specific gravity of soil particles is significantly negatively correlated with organic matter content;As the organic matter content in the soil increases,both the compression coefficient and compression index increase,while the compression modulus decreases;The influence of organic matter content on unconfined compressive strength and quick shear strength is inconsistent,with the former showing a negative correlation and the latter showing a positive correlation;With regard to the quick shear strength parameters,there is a significant positive correlation between cohesion and organic matter content,with a range of 1.58 kPa to 27.68 kPa;The internal friction angle is negatively correlated with the organic matter content,with a range of of 11.1°to 12.3°.The research results can provide a basis for the engineering construction in peatland areas.

关 键 词：岩土力学 泥炭土 有机质含量 物理性质 强度特征 

分 类 号：TU411[建筑科学—岩土工程]