Nailing Reinforcement Mechanism for Soil Slopes with Dual Structure under Drawdown Condition
Nailing Reinforcement Mechanism for Soil Slopes with Dual Structure under Drawdown Condition
In this study, centrifuge model tests were conducted on a typical kind of heterogeneous slope with dual structure under drawdown condition. The slope model is made up of clay and sand layers with different soil nail layouts. An unreinforced slope was tested for comparison. Full field displacement of the slope was obtained using image-based measurement.
The test results show that the nails improve the stability level and reduce the deformation of heterogeneous slopes. The nail reinforced slope exhibits a downward progressive failure from the slope top. The slope failure mechanism was illustrated with the coupling effect of deformation localization and local failure according to the full field displacement analysis. The slip surface of the slope is remarkably affected by the nails especially the shape and depth. The nail reinforcement mechanism was discussed based on slope failure mechanism. The nail-soil interaction induces the deformation distribution to be more uniform so that the decreases the degree of deformation localization. As a result, the safety level of the heterogeneous slope is enhanced.
Ga Zhang; Yueyan Hao
5th European Conference on Physical Modelling in Geotechnics (ECPMG2024)
Geotechnical infrastructure
https://doi.org/10.53243/ECPMG2024-124
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