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A platform for research: civil engineering, architecture and urbanism
Experimental study of the performance of geosynthetics-reinforced soil walls under differential settlements
Abstract The deformation performance and settlement failure mechanism of geosynthetics-reinforced soil (GRS) walls are the two key points of engineering design under the differential settlement. This paper presents model tests of deformation performance and failure mechanism of the GRS wall with and without lateral restriction under differential settlement conditions. The observation and measurement results, including force and vertical displacement of geosynthetics and lateral deformation of facing panels, indicate good settlement control performance of GRS wall during construction and under differential settlement. Results indicate that the influence of the stress state of facing panels on the settlement control performance of GRS wall cannot be ignored. And the differential settlement failure of GRS wall is likely to occur in the joint of facing panels and geosynthetics. For good illustrations, two analytical approaches about deformation and stress of geosynthetics were proposed based on elastic cable theory, in GRS wall with and without lateral restriction. The expressions exclude the necessity to carry out sophisticated numerical analyses to stress and deformation and may help to develop the design guidelines for such GRS wall.
Highlights Deformation and stress distribution are obtained by the mechanical analysis of elastic cable theory. The critical stress value of geosynthetics is indicative of geosynthetic-reinforced soil wall destroy. Failure of geosynthetic-reinforced soil wall is mainly caused by "stress concentration-fracture-separation" of geosynthetics. The maximum stress is concentrated at the joint of facing panels and geosynthetics.
Experimental study of the performance of geosynthetics-reinforced soil walls under differential settlements
Abstract The deformation performance and settlement failure mechanism of geosynthetics-reinforced soil (GRS) walls are the two key points of engineering design under the differential settlement. This paper presents model tests of deformation performance and failure mechanism of the GRS wall with and without lateral restriction under differential settlement conditions. The observation and measurement results, including force and vertical displacement of geosynthetics and lateral deformation of facing panels, indicate good settlement control performance of GRS wall during construction and under differential settlement. Results indicate that the influence of the stress state of facing panels on the settlement control performance of GRS wall cannot be ignored. And the differential settlement failure of GRS wall is likely to occur in the joint of facing panels and geosynthetics. For good illustrations, two analytical approaches about deformation and stress of geosynthetics were proposed based on elastic cable theory, in GRS wall with and without lateral restriction. The expressions exclude the necessity to carry out sophisticated numerical analyses to stress and deformation and may help to develop the design guidelines for such GRS wall.
Highlights Deformation and stress distribution are obtained by the mechanical analysis of elastic cable theory. The critical stress value of geosynthetics is indicative of geosynthetic-reinforced soil wall destroy. Failure of geosynthetic-reinforced soil wall is mainly caused by "stress concentration-fracture-separation" of geosynthetics. The maximum stress is concentrated at the joint of facing panels and geosynthetics.
Experimental study of the performance of geosynthetics-reinforced soil walls under differential settlements
Lu, Liang (author) / Ma, Shuwen (author) / Wang, Zongjian (author) / Zhang, Yi (author)
Geotextiles and Geomembranes ; 49 ; 97-108
2020-09-20
12 pages
Article (Journal)
Electronic Resource
English
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