Stone drop tests on different compositions of geotextiles and protective layers
Stone drop tests on different compositions of geotextiles and protective layers
Geotextiles are often used as a filter layer in coastal engineering. To stabilize the geotextile and the soil layers underneath, they are covered with one or several layers of stones. The installation procedure, involving dropping of stones from a certain height on the geotextile, proves to be quite risky. Regularly, the geotextile does not survive the installation of the stones and is punctured. This paper describes experimental research on the impact of stones directly on a geotextile on sand, and the influence of a layer of smaller stones that is on top of the geotextile for ballast and protection. Surprisingly, a ballast layer of stones demonstrated limited protective efficacy, leading to damage due to sharp edges and localized point loadings. Reed proved effective in preventing damage, likely due to reduced friction and impact damping. Additionally, impact on a flat plane of the falling stone, resulted in less penetration but higher perpendicular impact loads compared to a point or rib impact. Calculations show lower impact velocities underwater, prompting recommendations for further underwater impact investigations.
Adam Bezuijen; Maarten Van der Steen; S. J. M. van Eekelen; R. Zwaan; Yao Yang Su
5th European Conference on Physical Modelling in Geotechnics (ECPMG2024)
Onshore and offshore foundation systems
https://doi.org/10.53243/ECPMG2024-84
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