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A platform for research: civil engineering, architecture and urbanism
Model tests of geosynthetic-reinforced soil walls with marginal backfill subjected to rainfall
https://orcid.org/0000-0003-4460-7085
Abstract A series of model tests were conducted to investigate the performance of geosynthetic-reinforced soil (GRS) walls with marginal backfill subjected to rainfall infiltration. The effectiveness of improvement measures—such as decreasing reinforcement spacing and increasing sand cushion thickness—to prevent the GRS wall failure due to heavy rainfall was evaluated. The distribution and variation of the volumetric water content, porewater pressure, wall deformation, and reinforcement tensile strain were monitored during the test. The advancement of the wetting front and the drainage function of sand cushions were visually observed using the fluorescent dyeing technique. For the baseline case, the wall began to deform as rainfall proceeded, causing the potential failure surface to gradually move backward. When the potential failure surface moved beyond the reinforced zone, the pullout of the topmost reinforcement layers occurred, resulting in the collapse of the GRS wall in a compound failure mode. Decreases in reinforcement spacing and increases in sand cushion thickness effectively reduced wall deformation and enhanced wall stability. The placing of sand cushions between the reinforcement layers can also delay water infiltration and reduce the accumulation of porewater pressure inside the wall. Suggestions for designing rain-resistant GRS walls are also proposed based on the findings.
Highlights To presents a series of model tests to investigate the performance of GRS walls with marginal backfill subjected to rainfall. To assess the effectiveness of various reinforcement spacings and sand cushion thicknesses for improving the drainage and stability of GRS walls. To propose an innovative method using the fluorescent dyeing technique to visually observe the advancement of the wetting front and seepage traces within in the GRS wall. To provide design suggestions for improving the resistance of GRS structures to rainfall.
Model tests of geosynthetic-reinforced soil walls with marginal backfill subjected to rainfall
https://orcid.org/0000-0003-4460-7085
Abstract A series of model tests were conducted to investigate the performance of geosynthetic-reinforced soil (GRS) walls with marginal backfill subjected to rainfall infiltration. The effectiveness of improvement measures—such as decreasing reinforcement spacing and increasing sand cushion thickness—to prevent the GRS wall failure due to heavy rainfall was evaluated. The distribution and variation of the volumetric water content, porewater pressure, wall deformation, and reinforcement tensile strain were monitored during the test. The advancement of the wetting front and the drainage function of sand cushions were visually observed using the fluorescent dyeing technique. For the baseline case, the wall began to deform as rainfall proceeded, causing the potential failure surface to gradually move backward. When the potential failure surface moved beyond the reinforced zone, the pullout of the topmost reinforcement layers occurred, resulting in the collapse of the GRS wall in a compound failure mode. Decreases in reinforcement spacing and increases in sand cushion thickness effectively reduced wall deformation and enhanced wall stability. The placing of sand cushions between the reinforcement layers can also delay water infiltration and reduce the accumulation of porewater pressure inside the wall. Suggestions for designing rain-resistant GRS walls are also proposed based on the findings.
Highlights To presents a series of model tests to investigate the performance of GRS walls with marginal backfill subjected to rainfall. To assess the effectiveness of various reinforcement spacings and sand cushion thicknesses for improving the drainage and stability of GRS walls. To propose an innovative method using the fluorescent dyeing technique to visually observe the advancement of the wetting front and seepage traces within in the GRS wall. To provide design suggestions for improving the resistance of GRS structures to rainfall.
Model tests of geosynthetic-reinforced soil walls with marginal backfill subjected to rainfall
https://orcid.org/0000-0003-4460-7085
Abstract A series of model tests were conducted to investigate the performance of geosynthetic-reinforced soil (GRS) walls with marginal backfill subjected to rainfall infiltration. The effectiveness of improvement measures—such as decreasing reinforcement spacing and increasing sand cushion thickness—to prevent the GRS wall failure due to heavy rainfall was evaluated. The distribution and variation of the volumetric water content, porewater pressure, wall deformation, and reinforcement tensile strain were monitored during the test. The advancement of the wetting front and the drainage function of sand cushions were visually observed using the fluorescent dyeing technique. For the baseline case, the wall began to deform as rainfall proceeded, causing the potential failure surface to gradually move backward. When the potential failure surface moved beyond the reinforced zone, the pullout of the topmost reinforcement layers occurred, resulting in the collapse of the GRS wall in a compound failure mode. Decreases in reinforcement spacing and increases in sand cushion thickness effectively reduced wall deformation and enhanced wall stability. The placing of sand cushions between the reinforcement layers can also delay water infiltration and reduce the accumulation of porewater pressure inside the wall. Suggestions for designing rain-resistant GRS walls are also proposed based on the findings.
Highlights To presents a series of model tests to investigate the performance of GRS walls with marginal backfill subjected to rainfall. To assess the effectiveness of various reinforcement spacings and sand cushion thicknesses for improving the drainage and stability of GRS walls. To propose an innovative method using the fluorescent dyeing technique to visually observe the advancement of the wetting front and seepage traces within in the GRS wall. To provide design suggestions for improving the resistance of GRS structures to rainfall.
Model tests of geosynthetic-reinforced soil walls with marginal backfill subjected to rainfall
Yang, Kuo-Hsin (author) / Wu, Hsin-Ming (author) / Tseng, Ting-Ling (author) / Yoo, Chungsik (author)
Geotextiles and Geomembranes ; 51 ; 342-359
2022-12-12
18 pages
Article (Journal)
Electronic Resource
English
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