Global Stability and Failure Performance of Geosynthetic-Reinforced Column-Supported Embankments.
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| Title: | Global Stability and Failure Performance of Geosynthetic-Reinforced Column-Supported Embankments. |
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| Authors: | Xia, Boyang1 (AUTHOR) boyang_1027@tju.edu.cn, Zheng, Gang2 (AUTHOR) zhenggang1895@vip.163.com, Zhou, Haizuo3 (AUTHOR) hzzhou@tju.edu.cn, Kalumba, Denis4 (AUTHOR) denis.kalumba@uct.ac.za |
| Source: | Journal of Geotechnical & Geoenvironmental Engineering. Jun2026, Vol. 152 Issue 6, p1-15. 15p. |
| Subject Terms: | *Structural failures, *Embankments, *Dynamic stability, *Strains & stresses (Mechanics), *Effective stress (Soil mechanics), *Computer simulation |
| Abstract: | The geosynthetic-reinforced column-supported embankment (GRCSE) system offers a time-efficient solution for construction on soft ground. However, its global failure mechanisms need further investigation due to the complex interactions among different types of columns (e.g., stone columns, deep cement mixing columns, and concrete columns), geosynthetics, and soft soil. In this study, two centrifuge model tests were conducted to investigate the global stability of GRCSE systems with different configurations of basal reinforcement layers. The primary objectives of these tests were to reveal the stress transfer mechanisms and failure processes in the GRCSE system. The results demonstrated that the concrete columns underwent bending failure, displaying progressive failure characteristics under increased surcharge loading. The geosynthetic reinforcement exhibited rupture failure at both the embankment centerline and shoulder. Increasing the number of basal reinforcement layers improved load transfer efficiency, thereby constraining the horizontal displacement of the GRCSE system and enhancing the resistance of the columns to bending failure. Numerical simulations further revealed the complete evolution of soil arching within the GRCSE system. The deflection and damage observed in the column rows were directly correlated with the degradation of the soil arching. Finally, based on the combined results of centrifuge model tests and numerical simulations, the propagation of failure in the GRCSE system under increased surcharge loading was characterized. These findings contribute to the global stability evaluation of GRCSE systems. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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