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An analytical model of the additional confining stress in a prestress-reinforced embankment

  • Fang Xu (School of Civil Engineering, Central South University) ;
  • Wuming Leng (School of Civil Engineering, Central South University) ;
  • Xi Ai (School of Civil Engineering, Central South University) ;
  • Hossein Moayedi (Institute of Research and Development, Duy Tan University) ;
  • Qishu Zhang (School of Civil Engineering, Central South University) ;
  • Xinyu Ye (School of Civil Engineering, Central South University)
  • Received : 2022.12.12
  • Published : 2023.05.25
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Abstract

Using a device composed of two lateral pressure plates (LPPs) and a steel reinforcement bar to apply horizontal pressure on slope surfaces, a newly developed prestress-reinforced embankment (PRE) is proposed, to which can be adopted in strengthening railway subgrades. In this study, an analytical model, which is available of calculating additional confining stress (σH) at any point in a PRE, was established based on the theory of elasticity. In addition, to verify the proposed analytical model, three dimensional (3D) finite element analyses were conducted and the feasibility in application was also identified and discussed. In order to study the performance of the PRE, the propagation of σH in a PRE was analyzed and discussed based on the analytical model. For the aim of convenience in application, calculation charts were developed in terms of three dimensionless parameters, and they can be used to accurately and efficiently predict the σH in a PRE regardless of the embankment slope ratio and LPP side length ratio. Finally, the potential applications of the proposed analytical model were discussed.

Keywords

Acknowledgement

The research described in this paper was financially supported by the the National Natural Science Foundation of China (Grant No. 51978672, 51709284, and 51678572) and the Graduate Innovation Project of Central South University (Grant No. 2019zzts283).

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