Numerical Simulation Analysis of Geogrid-Reinforced Embankment on Soft Clay
Based on a previous centrifugal test, the finite-difference program FLAC3D was employed to simulate the centrifugal test and the prototype embankment corresponding to this centrifugal test. The variations of embankment settlements, reinforcement tensile forces and horizontal displacements were analysed. The results show that the computed displacements and reinforcement tensile forces are in good agreement with the measured ones, indicating the appropriate numerical model. Reinforcement can reduce the horizontal displacement of foundation. The settlement and the difference of the prototype embankment, away from the center, are less than those of centrifugal model. It is shown that the numerical model for the prototype can fully consider the reinforcement effect, which will help to diffuse the embankment load and homogenize the shallow stress of foundation.
KeywordsSoft clay foundation Geogrid Centrifugal test Prototype embankment Numerical simulation
This work is supported by National Key R&D Program of China (NO. 2017YFC0806003), Fundamental Research Funds for the Central Universities, National Natural Science Foundation of China (NO. 41602287), Key Project of Natural Science Foundation of China (NO. 41731283) and National Natural Science Foundation of China (NO. 41372272).
- 2.Viswanadham, B.V.S., Mahajan, R.: Modeling of geotextile reinforced highway slopes in a geotechnical centrifuge. In: Geotechnical Engineering for Transportation Projects, pp. 637–646 (2004)Google Scholar
- 4.Zhang, J., Huang, X.: Centrifuge model tests and numerical simulation of geosynthetic-reinforced embankment for expressway widening. J. Highw. Transp. Res. Dev. 28(4), 1–5 (2011)Google Scholar
- 7.Chen, J.F., Yu, S.B., Ye, T.F., et al.: Centrifuge test on reinforced embankment with lime-stabilized soil as backfill on soft clay. Chin. J. Rock Mech. Eng. 02, 287–293 (2008). (in Chinese)Google Scholar
- 8.Zhang, Y., Xue, Y.Q., Wu, J.C., et al.: Parameters of Duncan-Chang model for hydrostratigraphic units in Shanghai City. Hydrogeol. Eng. Geol. 35(1), 19–22 (2008). (in Chinese)Google Scholar