有机质含量对滇池重塑泥炭质土动强度特性的影响

为了研究滇池泥炭质土中有机质成分对于土体动强度特性的影响，对不同有机质含量的饱和重塑泥炭质土进行室内动三轴试验，研究了不同有机质含量、固结压力、振动频率对重塑泥炭质土的动强度曲线的影响，分析了不同有机质含量、振动频率及循环振次控制条件下重塑泥炭质土的动强度指标的变化规律。得出结论如下：重塑泥炭质土的动剪应力在其他条件相同时，均随着固结压力、振动频率和有机质含量的增加而增大。其中有机质含量对重塑饱和泥炭质土的动强度影响最大，土体动强度指标随有机质含量增加呈明显正相关性。重塑饱和泥炭质土动强度受荷载振动频率的影响较小，动强度指标总体上随振动频率的增大有小幅提升。循环振次则对重塑饱和泥炭质土动强度呈负相关影响。

Influence of Organic Matter Content on Dynamic Strength Characteristics of Remolded Peaty Soil in Dianchi Lake

In order to study the effect of organic matter composition on the dynamic strength characteristics of peat soil in Dianchi Lake, an indoor dynamic triaxial test was carried out on saturated remolded peat soil with different organic matter content. The effects of different organic matter content, consolidation pressure and vibration frequency on the dynamic strength curve of remolded peat soil were studied. The dynamic strength indexes of remolded peat soil under different organic matter content, vibration frequency and cyclic vibration times were analyzed. The conclusions are as follows: When other conditions are the same, the dynamic shear stress of remolded peat soil increases with the increase of consolidation pressure, vibration frequency and organic matter content. The content of organic matter has the greatest influence on the dynamic strength of remolded saturated peat soil, and the dynamic strength index of soil has an obvious positive correlation with the increase of organic matter content. The dynamic strength of remolded saturated peat soil is less affected by load vibration frequency, and the dynamic strength index increases slightly with the increase of vibration frequency. The cyclic vibration times have a negative correlation with the dynamic strength of remolded saturated peat soil.