| 陈昌盛.改性分散性黏土力学特性试验研究[J].矿产勘查,2025,16(11):2476-2482 |
| 改性分散性黏土力学特性试验研究 |
| Experimental study on mechanical properties of modified dispersed clay |
| 投稿时间：2024-03-12 |
| DOI：10.20008/j.kckc.202511008 |
| 中文关键词: 改性分散性黏土 变形特性 剪切试验 冻融试验 蠕变试验 |
| 英文关键词: modified dispersed soil deformation characteristics shear test freeze-thaw test creep test |
| 基金项目:本文受贵州省公益地勘基金项目(黔耕调(2017-03-36))资助。 |
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| 中文摘要: |
| 分散性黏土遇水易分散流失，极易对堤坝和水渠等水利工程造成不利影响。本试验以土堤分散性黏土为研究对象，对分散性黏土进行了改性，通过冻融试验、三轴剪切试验及蠕变试验分析了改性效果，揭示了改性对冻融变形特性和蠕变特性的影响规律，结果表明，分散性黏土经水泥、石灰、粉煤灰改性处理后，能够有效地抑制土体冻胀变形的产生，进而使土体冻胀性降低，其中掺 2%石灰+4%粉煤灰处理方案的融沉量最小，且在三轴剪切和蠕变过程中与分散性土表现出相似的变形特性，二者具有较好的变形协调性。本文研究对于分散性黏土堤防建设具有重要意义。 |
| 英文摘要: |
| Dispersive soil tends to erode and disperse upon contact with water, posing significant risks to hy.draulic structures such as embankments and canals. This study focuses on modifying dispersive soil from earth em.bankments. Through freeze-thaw cycling tests, triaxial shear tests, and creep tests, the effectiveness of the modifica.tion was evaluated. The research reveals how modification influences the deformation characteristics under freeze-thaw conditions and the creep behavior. Results indicate that treatment with cement, lime, and fly ash can effec.tively suppress frost deformation and reduce soil frost heave. Among the treatment schemes, the combination of 2%lime and 4% fly ash resulted in the smallest thaw settlement. Moreover, the modified soil exhibits deformation char.acteristics similar to those of untreated dispersive soil in triaxial shear and creep tests, with both demonstrating fa.vorable deformation coordination. This study is of great significance for the construction of dispersed soil embank.ments. |
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