Geomechanics and Engineering

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Evolution of pullout behavior of geocell embedded in sandy soil

  • Yang Zhao (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences) ;
  • Zheng Lu (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences) ;
  • Jie Liu (Xinjiang Transportation Planning Survey and Design Institute Co., Ltd.) ;
  • Jingbo Zhang (CCCC Second Highway Consultants Co., Ltd.) ;
  • Chuxuan Tang (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences) ;
  • Hailin Yao (State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences)
  • Received : 2023.04.17
  • Accepted : 2024.07.18
  • Published : 2024.08.10
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Abstract

This paper aims to explore the evolution of the pullout behavior of geocell reinforcement insights from three-dimensional numerical studies. Initially, a developed model was validated with the model test results. The horizontal displacement of geocells and infill sand and the passive resistance transmission in the geocell layer were analyzed deeply to explore the evolution of geocell pullout behavior. The results reveal that the pullout behavior of geocell reinforcement is the pattern of progressive deformation. The geocell pockets are gradually mobilized to resist the pullout force. The vertical walls provide passive pressure, which is the main contributor to the pullout force. Hence, even if the frontal displacement (FD) is up to 90m mm, only half of the pockets are mobilized. Furthermore, the parametric studies, orthogonal analysis, and the building of the predicted model were also carried out to quantitative the geocell pullout behavior. The weights of influencing factors were ranked. Ones can calculate the pullout force accurately by inputting the aspect ratio, geocell modulus, embedded length, frontal displacement, and normal stress.

Keywords

Acknowledgement

This work was supported by the National Natural Science Foundation of China (Nos. 420772622, 42077261, and 41972294). In addition, Yang Zhao wants to thank Juan Li and Guan-lin Zhao for their encouragement and support over the past few years.

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