| 朱国权.不同剪切速率下滑带土强度特性及孔隙分形特征研究[J].矿产勘查,2021,12(5):1256-1263 |
| 不同剪切速率下滑带土强度特性及孔隙分形特征研究 |
| Ttrength characteristics and pore fractal characteristics of slip soil under di erent shear rates |
| 投稿时间：2020-12-06 |
| DOI： |
| 中文关键词: 滑带土 剪切速率 残余强度 核磁共振 孔隙分形 |
| 英文关键词: slip soil shear rate residual strength nuclear magnetic resonance pore fractal |
| 基金项目:本文受国家自然科学基金资助项目(51268003)资助。 |
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| 中文摘要: |
| 滑带土的抗剪强度和微观结构的变化与滑坡岩土体的稳定性具有密切的联系。本文开展了不同剪切速率下粘性滑带土的环剪试验和核磁共振试验，从宏观与微观的角度分析了滑带土在不同剪切速率下的残余强度特征及微观孔隙的分形特征。研究结果表明:滑带土的残余强度随剪切速率的增加呈指数函数减小；剪切后试样内部孔隙的总体积随剪切速率的增加而降低，且试样内部的孔隙具有明显的分形特征，随着剪切速率的增加，孔隙分形维数先下降后上升；分形维数的变化与滑带土残余强度具有显著的高斯函数变化关系。该成果可为相关滑坡岩土体力学性质的研究提供一定的理论依据。 |
| 英文摘要: |
| The anti-shear strength and microstructure variation of slip soil are closely related to the stability of landslide rock mass This paper carried out ring-shear test and nuclear magnetic resonance test on viscous slip soil under different shear rates,and analyzed the residual strength characteristics and micro pore fractal characteristics of slip soil under di erent shear rates from both macro and micro perspective The research results show that the residual strength of slip soil decreases exponentially with the increase of shear rate;the total volume of pores in the samples decreases with the increase of shear rate,and the pores in the sample have obvious fractal characteristics,and the pore fractal dimension rstly decreases and then increases with the increase of shear rate;the change of fractal dimension has a signi cant Gaussian function relationship with the residual strength of slip soil The results provide a certain theoretical basis for further study on mechanical properties of related landslide rock and soil |
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