LIU Ze,Yan Wenqing,LIU Huan,et al.Field Test and Numerical Analysis of embankment Reinforced by Geogrid[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):1105-1112.
LIU Ze,Yan Wenqing,LIU Huan,et al.Field Test and Numerical Analysis of embankment Reinforced by Geogrid[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(05):1105-1112. DOI: 10.13409/j.cnki.jdpme.201905002.
Field Test and Numerical Analysis of embankment Reinforced by Geogrid
Combined with the construction of a geogrid reinforced embankment, earth pressure cells and flexible displacement meters were embedded. The distribution of vertical earth pressure, horizontal earth pressure, and tension strain of geogrid during embankment construction were measured. Based on this test, a numerical model of the reinforced embankment was established, and the deformation and morphology of the potential slip surface of the reinforced embankment were studied. The results show that: (1) the vertical earth pressure in the geogrid-reinforced embankment increases with the increase of embankment filling height, and the vertical earth pressure along the direction of geogrid layout presents a "single peak" distribution; the peak value appears near the middle of geogrid; (2) the horizontal earth pressure behind the ecological bag on the slope surface was smaller, and is obviously affected by the lateral deformation of the embankment slope; the horizontal earth pressure after reinforcement increases approximately linearly with the increase of fill height; (3) the tension strain of the main reinforcement part of the geogrid in each layer of embankment also demonstrates a "single peak" shape in the direction of reinforcement distribution, and the peak value usually occurs at 3.5m away from the slope surface; (4) the tension strain of the backpack part of the reinforcement mainly occurs during the construction of two adjacent layers of the upper fill; (5) the potential fracture surface of the reinforced embankment can be simplified to a 0.35H crease line type.
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