...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of soil science >Effects of Variable Angular Velocities and Soil Moisture Contents on Undrained Shear Strength in a Sandy Loam Soil (Eutric Leptosol)
【24h】

Effects of Variable Angular Velocities and Soil Moisture Contents on Undrained Shear Strength in a Sandy Loam Soil (Eutric Leptosol)

机译：变角速度和土壤含水量对砂壤土（淡水细沙）不排水抗剪强度的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The study discusses the empirical derivation of undrained shear strength Sund from vane tests and compared this to those derived from predictions under the influence of both angular velocity (ω) and Soil Moisture Content (SMC) percentage. The study conducted on partially and fully saturated samples of sandy loam soil (Eutric leptosol) evaluated the effects of three different angular velocities and Soil Moisture Contents (SMCs) on the Sund, using a pocket vane tester. The angular velocities used in this study were 7.2, 3.6 and 1.8° sec?1, which corresponded to rotation rates of 5, 10 and 20 sec per 0.1 kg cm-2, respectively. The results showed that Sund positively correlated with time to failure (tf) irrespective of change in the angular velocity and negatively correlated with both (ω) and SMC, which both were best described using a power function: Sund = Λθ-β. The Sund was constant at any given SMC regardless of variations in angular velocity however, the Sund decreased with increase in SMC suggesting that Sund was largely controlled by SMC and less by w. Decoupling the torque into the cylindrical and horizontal shear components showed that the shear resistance generated by the cylindrical or vertical torque (Tv) was more or less constant around 0.1 kg cm-2 till failure, whereas the shear resistance generated by the horizontal torque (Th) was variable at about 0.3 kg cm-2. On average, the Th was three times the Tv, while the measured Sund was overestimated by about 40% higher than the predicted Sund.
机译：该研究讨论了通过叶片试验得出的不排水抗剪强度S und 的经验推导，并将其与在角速度（ω）和土壤水分含量（SMC）百分比的影响下从预测推导得出的推导进行了比较。使用袋装叶片测试仪，对部分和完全饱和的沙壤土样品（Eutric钩端藤）进行了研究，评估了三种不同的角速度和土壤含水量（SMC）对S und 的影响。本研究中使用的角速度为7.2、3.6和1.8°sec ？1 ，对应于每0.1 kg cm -2 的旋转速度分别为5、10和20秒， 分别。结果表明，S und 与失效时间（t f ）正相关，而与角速度的变化无关，而与（ω）和SMC均呈负相关。最好使用幂函数来描述：S und =Λθ-β。在任何给定的SMC中，S und 都是恒定的，而与角速度的变化无关，但是，随着SMC的增加，S und 减小，这表明S und 主要由SMC控制，而由w控制。将扭矩解耦到圆柱和水平剪切分量中可知，圆柱或垂直扭矩（T v ）产生的剪切阻力在0.1 kg cm -2 h ）产生的剪切阻力在0.3 kg cm -2 左右变化。平均而言，T h 是T v 的三倍，而测得的S und 被高估了约40％。 und 。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号