Volume 15 Issue 4
Dec.  2022
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Article Navigation >  Water Science and Engineering  > 2022  >  15(4): 358-366
Chao-min Shen, Si-hong Liu, Liu-jiang Wang, Ji-du Yu, Hao Wei, Ping Wu. 2022: Packing, compressibility, and crushability of rockfill materials with polydisperse particle size distributions and implications for dam engineering. Water Science and Engineering, 15(4): 358-366. doi: 10.1016/j.wse.2022.07.003
Citation: Chao-min Shen, Si-hong Liu, Liu-jiang Wang, Ji-du Yu, Hao Wei, Ping Wu. 2022: Packing, compressibility, and crushability of rockfill materials with polydisperse particle size distributions and implications for dam engineering. Water Science and Engineering, 15(4): 358-366. doi: 10.1016/j.wse.2022.07.003
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Packing, compressibility, and crushability of rockfill materials with polydisperse particle size distributions and implications for dam engineering

doi: 10.1016/j.wse.2022.07.003

  • a College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

  • b International Joint Laboratory of Long-term Behaviour & Environmentally Friendly Rehabilitation Technologies on Dams, Hohai University, Nanjing 210098, China

  • c China Railway Water Conservancy & Hydropower Planning and Design Group Co. Ltd., Nanchang 330029, China

Funds:

This work was supported by the National Natural Science Foundation of China (Grants No. 52009036, U1765205, and 51979091) and the Key Project of Water Conservancy Science and Technology in Jiangxi Province (Grant No. 201921ZDKT13).

  • Received Date: 2021-11-07
  • Accepted Date: 2022-07-30
  • Rev Recd Date: 2022-06-16
    • Available Online: 2022-11-04
    Abstract
  • In rockfill dam engineering, particle breakage of rockfill materials is one of the major factors resulting in dam settlement. In this study, onedimensional compression tests on a series of coarse granular materials with artificially-graded particle size distributions (PSDs) were carried out. The tests focused on understanding the role of initial PSDs in the dense packing density, compressibility and crushability of coarse granular materials. The effects of fractal dimension (D) and size polydispersity (θ) of PSDs were quantitatively analyzed. Two different loading stages were identified from the logarithms of the stressestrain relationships, with the turning point marked as the yield stress. A similar effect of initial PSDs was observed on the packing density and low-pressure modulus of coarse granular materials. The packing density and low-pressure modulus increased monotonically with θ, and their peak values were attained at a D value of approximately 2.2. However, there was no unique correspondence between the dense packing density and low-pressure modulus. The particle breakage was influenced differently by the initial PSDs, and it decreased with the values of D and θ. The emergence of the unique ultimate state was also identified from both the compression curves and PSDs of the samples after the tests. The potential implications of the test results in the design of both low and high rockfill dams were also demonstrated.

     

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