| 细粒含量对饱和砂类土液化强度的影响 |
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| 引用本文： | 王海波,吴琪,杨平.细粒含量对饱和砂类土液化强度的影响[J].岩土力学,2018,39(8):2771-2779. |
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| 作者姓名： | 王海波 吴琪 杨平 |
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| 作者单位： | 1. 南京林业大学 土木工程学院，江苏 南京 210037；2. 南京工业大学 岩土工程研究所，江苏 南京 210009 |
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| 基金项目： | 国家自然科学基金（No. 51478226）；江苏高校优势学科建设工程资助项目（No. PAPD）。 |
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| 摘 要： | 为研究细粒含量FC对不同密实状态饱和砂类土液化强度CRR的影响，将不同FC的砂类土试样分为3组：（1）相同的相对密实度 50%；（2）相同的孔隙比 0.90；（3）相同的骨架孔隙比 1.20，对不同FC和密实状态（ 、e和 ）的砂类土进行了一系列不排水循环三轴试验。试验结果显示：e或 相同的砂类土CRR随着FC的增加逐渐降低；具有相同 砂类土的CRR随FC的增加迅速增大，砂类土的CRR与 、e或 都没有较好的相关性。分析表明：不同FC和密实状态砂类土的CRR随等效骨架孔隙比 的增大而降低，两者呈现较好的负幂函数关系，这表明考虑细粒影响程度的 是合理表征不同种类砂类土CRR的一个物理状态指标。通过对比已有的砂类土的试验结果发现：砂类土中的砂粒是影响CRR的重要因素，且随着砂粒的形状从圆状向角状变化，砂类土的总体CRR逐渐增大。
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| 关 键 词： | 砂类土 液化强度 细粒含量 密实状态 等效骨架孔隙比。 |
| 收稿时间： | 2016-10-17 |
Effect of fines content on liquefaction resistance of saturated sandy soils |
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| WANG Hai-bo,WU Qi,YANG Ping.Effect of fines content on liquefaction resistance of saturated sandy soils[J].Rock and Soil Mechanics,2018,39(8):2771-2779. |
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| Authors: | WANG Hai-bo WU Qi YANG Ping |
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| Institution: | 1. College of Civil Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China; 2. Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing, Jiangsu 210009, China |
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| Abstract: | In order to investigate the effect of fine content (FC) on liquefaction resistance (CRR) of saturated sandy soils with different densities, three cases are categorized: 1) at a constant relative density 50%; 2) at a constant void ratio e = 0.90; 3) at a constant skeleton void ratio 1.20. A series of undrained cyclic triaxial tests were performed on sandy soils with different FC and density state ( , e and ). The test results show that an increase in FC causes a decrease in CRR of sandy soils at a constant or e. and the CRR of sandy soils at a constant will increase with the increase of FC. There is no clear correlation between , e or and CRR for saturated sandy soils with different FC. Moreover, the test data in this study reveal that the CRR of sandy soils with different FC and density decease with the increase of the . A power relationship between a decrease in CRR and an increase in indicates that the fraction of the fines contributes to the formation sustaining the loads can be used as an index to uniquely evaluate the CRR of different kinds of sandy soils. By comparing the published results of the other sandy soils, it is found that the sand grain is an important factor affecting the CRR of sandy soils, and the overall CRR of the sandy soils will increasing as grain shape changing from spherical to angular. |
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| Keywords: | sandy soils liquefaction resistance fines content density state equivalent skeleton void ratio |
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