| 膨胀土两种不同条件下抗剪强度比较 |
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| 引用本文： | 李振,邢义川,周俊.膨胀土两种不同条件下抗剪强度比较[J].水力发电学报,2009,28(1). |
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| 作者姓名： | 李振 邢义川 周俊 |
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| 作者单位： | 李振,LI Zhen(西北农林科技大学水利与建筑工程学院,陕西,杨凌,712100);邢义川,XING Yichuan(中国水利水电科学研究院,北京,100044);周俊,ZHOU Jun(中国水电顾问集团西北勘测设计研究院,西安,710065)
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| 基金项目： | 水利部引进国际先进农业科学技术计划(948计划)，西北农林科技大学科研专项面上项目 |
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| 摘 要： | 本文利用直剪仪对安康膨胀土进行了直接剪切试验和增湿剪切试验,并对试验结果进行了比较.试验和对比结果表明,膨胀土的极限剪应力、凝聚力和摩擦角都随着含水率的增大而减小;增湿剪切试验在相同固结压力下随着含水率的增加试破坏时的剪应力值比直剪试验破坏时的剪应力值小的越多,含水率越小,两种剪切试样的破坏剪应力值差别越小;先浸水后剪切(相同含水率直剪试验)与先剪切后浸水(增湿剪切试验)所得强度值相差甚远;在增湿过程中的凝聚力内摩擦角都随着含水率的增加而减小,并具有较好的线性关系.
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| 关 键 词： | 岩上力学 抗剪强度 剪切试验 膨胀土 对比 |
Comparison with shear strength of the expansive soil under two different conditions |
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| LI Zhen,XING Yichuan,ZHOU Jun.Comparison with shear strength of the expansive soil under two different conditions[J].Journal of Hydroelectric Engineering,2009,28(1). |
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| Authors: | LI Zhen XING Yichuan ZHOU Jun |
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| Affiliation: | 1.College of Hydraulic and Architectural Engineering;Northwest Science & Technology University of Agriculture & Forestry;Yangling;Shaanxi 712100;2.China Institute of Water Resources and Hydropower Research;Beijing 100044;3.Northwest Institute of Investigation;Design and Research;CHECC;Xi-an 710065 |
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| Abstract: | The direct shear test and moistening shear test results are compared in this paper by using direct shear apparatus for the expansive soil in Ankang.The experiment and comparison results show that the ultimate shear stress,cohesion and angle of internal friction decrease along with the broadening of water content in the expansive soil.The shear stress value of samples in moistening shear test is much smaller than in direct shear test along with the increase of water content under the same consolidation press... |
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| Keywords: | rock and soil mechanics shear strength shear test the expansive soil comparison |
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