LIU Feiyu,WANG Xin,LI Jingting,et al.Dynamic Characteristics of Mixed Reinforced Earth Retaining Wall under Earthquake Loading[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):612-621.
LIU Feiyu,WANG Xin,LI Jingting,et al.Dynamic Characteristics of Mixed Reinforced Earth Retaining Wall under Earthquake Loading[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):612-621. DOI: 10.13409/j.cnki.jdpme.201901009.
Dynamic Characteristics of Mixed Reinforced Earth Retaining Wall under Earthquake Loading
In order to study the dynamic characteristics of the mixed reinforced earth retaining wall under earthquake loading, the dynamic analysis module of FLAC
3D
is introduced to module a three-dimensional dynamic analysis model of such retaining wall. The backfilling material of the retaining wall is pure sand or mixed reinforced soil (the thickness of the mixed thin sand layer is 3 cm, 5 cm, 8 cm, and 10 cm, respectivley). The horizontal displacement response, the internal force of the reinforcement, the failure mode and the acceleration response of the reinforced earth retaining wall are analyzed. By comparing and analyzing the respective characteristics of the two cases, the working mechanism of the mixed reinforced earth retaining wall is revealed. The analyses show that for the mixed reinforced earth retaining wall, there is an optimum value for the thickness of the thin sand layer. Under the same seismic peak acceleration, the horizontal displacement, the acceleration amplification factor, and the maximum internal force of the geogrid show a trend of decreasing first and then increasing when the thickness of the thin sand layer increases from 3 cm to 10 cm. When the peak acceleration of the earthquake is 0.4 g, and the thickness of the thin sand layer is 5 cm, the horizontal displacement has a peak of 28 cm, and the minimum values of the acceleration amplification factor and the maximum internal force of the geogrid are 1.74 and 22.5 kN, respectively.
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