Geomechanics and Engineering

Techno-Press (테크노프레스)
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Seismic earth pressure on embankment gravity retaining wall with nonuniform slope

  • Qu, Honglue (School of Geoscience and Technology, Southwest Petroleum University) ;
  • Deng, Yuanyuan (School of Geoscience and Technology, Southwest Petroleum University) ;
  • Hu, Qindi (School of Geoscience and Technology, Southwest Petroleum University) ;
  • Huang, Xue (School of Geoscience and Technology, Southwest Petroleum University) ;
  • Wang, Chenxu (School of Geoscience and Technology, Southwest Petroleum University) ;
  • Yan, Boyang (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • Zhou, Yundong (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • Gao, Yufeng (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University)
  • Received : 2020.10.24
  • Accepted : 2021.08.03
  • Published : 2021.09.10
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Abstract

According to the results of a survey of retaining structures damaged by the Wenchuan earthquake, the damage to gravity retaining walls accounted for 97.1% of the total damage to retaining walls. Among gravity retaining structures, embankment gravity retaining walls with nonuniform slopes are more prone to be disturbed under seismic conditions. However, relatively few studies have been performed to calculate the seismic earth pressure on such structures. In this study, a simplified approach is presented to calculate the seismic earth pressure on embankment gravity retaining walls with nonuniform slopes. In the proposed approach, the equations are derived based on the primary assumptions of the Mononobe-Okabe theory and the limit equilibrium state of the quadrilateral slip soil wedge. To verify the applicability of the proposed approach, a large-scale shaking-table test was conducted to obtain the distribution of the seismic earth pressure, the magnitude of earth pressure resultant force, the resultant force action point, and slip surface of an embankment gravity retaining wall with a nonuniform slope, under various peak ground accelerations. A comparison indicates that the calculated results were in agreement with the experimental results, implying that the proposed approach is valid for calculating the seismic earth pressure on embankment gravity retaining walls with nonuniform slopes.

Keywords

Acknowledgement

This study was supported by the National Key R&D Program of China under Grant no. 2018YFE0207100, the National Natural Science Foundation of China under Grant no. 41602332, the Youth Scientific and Technological Innovation Team of Southwest Petroleum University under Grant no. 2018CXTD02, and the Foundation of Engineering Research Center of Eco-environment in the Three Gorges Reservoir Region of China under Grant no. KF2018-01.

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