Study on Rolling Characteristics of Sand and Gravel Filling Materials Containing Extra Fine Sand in Face Rockfill Dam
The main filling material of the dam of the Altash Water Conservancy Project is given priority to gravel stone,the sand in the particle gradation of the river beach sand and gravel in this area is non-cohesive powdery fine sand with the characteristics of lack of medium-coarse sand in the sand gradation,discontinuous gradation,poor water retention,which affect the rolling compaction during the construction,making it very dif-ficult to control the quality of the construction process.During the construction of the project,experimental testing and the comprehensive statistical analysis of different rolling process parameters,such as different a-mounts of water,thicknesses,rolling passes,and rolling machines for the extra-fine sand and gravel filling ma-terials,are conducted to explore the relevant rolling construction parameters,optimize the construction parame-ters,improve the rolling parameters and the timeliness,provide the stable and reliable construction parameters for enhancing the reliability of the dam filling,reduce the settlement deformation of the dam body,improve the seismic safety reserve of the dam and controlling the dam construction quality.
Face rockfill damSand and gravel materialRolling characteristicsAltash Water Conservancy Pro-ject
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