Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (5): 1416-1426.doi: 10.13278/j.cnki.jjuese.20200313

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Numerical Simulation of Reinforced Soil Retaining Wall with Wrapped Face Under Seismic Effects

Cai Xiaoguang1,2,3, Xu Honglu1, Li Sihan4, Zhang Shaoqiu1   

  1. 1. College of Geological Engineering, Institute of Disaster Prevention, Sanhe 065201, Hebei, China;
    2. Hebei Key Laboratory of Earthquake Disaster Prevention and Risk Assessment, Sanhe 065201, Hebei, China;
    3. Key Laboratory of Building Collapse Mechanism and Disaster Prevention, China Earthquake Administration, Sanhe 065201, Hebei, China;
    4. Institute of Engineering Mechanics/Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, Harbin 150080, China
  • Received:2020-12-20 Online:2021-09-26 Published:2021-09-29
  • Supported by:
    Supported by the National Natural Science Foundation of China (51778144), Hebei Province Postgraduate Students' Innovative Ability Training Grant Program (CXZZSS2020150) and the Earthquake Science and Technology Starfire Project (XH204402)

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Abstract: Reinforced soil retaining wall with wrapped face is a kind of flexible panel retaining wall, which is widely used in many fields such as transportation, municipal, and water conservancy because of its good foundation adaptability and seismic safety. In this paper, the seismic performance of the reinforced soil retaining wall with wrapped face is investigated by using FLAC3D numerical simulation program to study the slope of the wall, geotechnical bag filler, and reinforcement strength. The results show that when the slope of the wall is less than 1:0.30, the distribution of soil pressure behind the wall is uniform and small, approximately vertical straight line; When the slope of the wall is greater than or equal to 1:0.30, the distribution of soil pressure behind the wall is consistent and in accordance with Rankine earth pressure theory. Therefore, when the wall slope is less than 1:0.30, the structure should be designed according to the reinforced soil slope; When the wall slope is greater than or equal to 1:0.30, the reinforced soil structure should be designed according to the reinforced soil retaining wall. The type of geotechnical bag filler has almost no effect on the seismic dynamic response of the reinforced soil retaining wall with wrapped face, so its effect on the retaining wall can be disregarded in the seismic design. The higher the strength of reinforcement, the better the seismic performance of the reinforced soil retaining wall, however the strength of reinforcement is not proportional to the seismic performance of the retaining wall, so, to greatly increase the strength of reinforcement will not greatly improve the seismic performance of the retaining wall due to the phenomenon of "saturation of reinforcement effect" of reinforced soil structure; Therefore, it is necessary to pay attention to the economical efficiency of the project under the premise that the strength of reinforcement meets the standard.

Key words: reinforced soil retaining wall with wrapped face, numerical simulation, seismic performance, wall slope, geobag filler, strength of geogrid

CLC Number: 

  • TU4
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