Volume 38 Issue 5
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Liu Shuguang. Small Strain Stiffness Property of Structured Loess[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2024, 38(5): 618-623. doi: 10.3969/j.issn.1007-2993.2024.05.018
Citation: Liu Shuguang. Small Strain Stiffness Property of Structured Loess[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2024, 38(5): 618-623. doi: 10.3969/j.issn.1007-2993.2024.05.018
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Small Strain Stiffness Property of Structured Loess

doi: 10.3969/j.issn.1007-2993.2024.05.018

  • Henan Water & Power Engineering Consulting Co., Ltd., Zhengzhou 450016, Henan, China

  • Received Date: 2023-08-04
    Available Online: 2024-10-09
  • Publish Date: 2024-10-09
    Abstract
  • Because of the soil skeleton containing dominant silt as well as interparticle cementation, the natural loess behaves in a structured way. To study the influence of structural properties on the small-strain stiffness of loess, resonant column tests were performed on typical natural and remolded loess under different confining pressures. The results showed that both the original and remolded loess exhibit a nonlinear stiffness characteristic within the small strain range and their shear modulus-shear strain (G-γ) relationships can be fitted by the Hardin-Drnevich hyperbolic model. Structural properties were found to significantly control the small-strain stiffness properties of loess, as exemplified by a higher shear modulus and a lower sensitivity of the maximum shear modulus to confining pressure of natural loess compared to the case of remolded soil. In addition, this study quantified the effect of structure on the small strain stiffness of loess and makes comparisons with some well-studied sands and clays (including London clay and Ottawa sand). This research enhanced the understanding of the mechanical behavior of structured loess and can provide technical reference for related engineering design.

     

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