Abstract
Abstract Geotextile tubes are one of the emerging and promising technologies to build fine-grain tailings dams. In this study, shaking table model tests are conducted to evaluate the seismic performance as characterized by horizontal acceleration and displacement of the tailings dam subject to horizontal peak ground accelerations (HPGAs). The test results indicate that the tailings dam is sustainable, whereas the whole dam tends to slide forward. Test results reveal a W-pattern variation of acceleration amplification coefficient (A m) at the same elevation despite different HPGA, whereas A m on the geotextile tubes exhibits minimal changes with increasing HPGA. A m inside the dam is highly variable in terms of the elevation and the specific position. The maximum vertical displacement occurs at the top of the geotextile tubes as the side of the geotextile tubes tilting upward. The highest horizontal displacement is observed in the middle section of the geotextile tubes, resulting in an overall convex deformation pattern. Two reinforcement schemes are proposed accordingly including strengthening the drainage and installing the anti-slide piles. The dynamic behaviors of the tailings dam subject to earthquakes from this study can serve as guidance for seismic design and technology promotion.
Highlights
Geotextile tubes are one of the emerging and promising technologies to build fine-grain tailings dams
The shaking table tests with different horizontal peak ground accelerations (HPGA) are performed on the model tailings dam constructed with geotextile tubes at a slope ratio of 1:1 and a full-slope height of 800 mm
Test results and a comparative analyses suggest that the test model box serves the purpose well for investigating the dynamic characteristics of tailings dam constructed with geotextile tubes subject to earthquake loads
Summary
Abstract: Geotextile tubes are one of the emerging and promising technologies to build fine-grain tailings dams. Yang et al [10] studied the successful application of geotextile tubes in the construction of tailings dam raise through comprehensive geotechnical investigation and stability analysis of the tailings embankment. Very limited studies have been reported to identify the dynamic characteristics of the tailings reservoir constructed using geotextile tubes subject to seismic load along with even fewer reports on tailings dam failure by shaking table tests. The variation law of acceleration and displacement, i.e., the dynamic characteristics, of the tailings reservoir constructed with geotextile tubes under seismic load is investigated through a large-scale shaking table model test. The research results are expected to provide a theoretical basis and reference for the design and safe operation of the tailings reservoir and promote the application of the tailings dam constructed with geotextile tubes
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