Geomechanics and Engineering

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Compaction techniques and construction parameters of loess as filling material

  • Hu, Chang-Ming (College of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Wang, Xue-Yan (College of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Mei, Yuan (College of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Yuan, Yi-Li (College of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Zhang, Shan-Shan (College of Civil Engineering, Xi'an University of Architecture and Technology)
  • Received : 2016.12.07
  • Accepted : 2018.04.02
  • Published : 2018.08.30
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Abstract

Loess often causes problems when used as a filling material in the construction of foundations. Therefore, the compaction technique, shear behavior, and bearing capacity of a filled foundation should be carefully considered. A series of tests was performed in this study to obtain effective compaction techniques and construction parameters. The results indicated that loess is strongly sensitive to water. Thus, the soil moisture content should be kept within 12%-14% when it is used as a filling material. The vibrating-dynamic combination compaction technique is effective and has fewer limitations than other methods. In addition, the shear strength of the compacted loess was found to increase linearly with the degree of compaction, and the soil's compressibility decreased rapidly with an increase in the degree of compaction when the degree of compaction was less than 95%. Finally, the characteristic value of the bearing capacity increased with an increase in the degree of compaction in a ladder-type way when the degree of compaction was within 92%-95%. Based on the test data, this paper could be used as a reference in the selection of construction designs in similar engineering projects.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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