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Physical and Numerical Models on Mechanically Stabilized Earth Walls Using Self-Fabricated Steel Reinforcement Grids Applied for Cohesive Soil in Vietnam
Chau, T.-L.; Nguyen, T.-H.; Pham, V.-N. Physical and Numerical Models of Mechanically Stabilized Earth Walls Using Self-Fabricated Steel Reinforcement Grids Applied to Cohesive Soil in Vietnam. Appl. Sci.2024, 14, 1283.
Chau, T.-L.; Nguyen, T.-H.; Pham, V.-N. Physical and Numerical Models of Mechanically Stabilized Earth Walls Using Self-Fabricated Steel Reinforcement Grids Applied to Cohesive Soil in Vietnam. Appl. Sci. 2024, 14, 1283.
Chau, T.-L.; Nguyen, T.-H.; Pham, V.-N. Physical and Numerical Models of Mechanically Stabilized Earth Walls Using Self-Fabricated Steel Reinforcement Grids Applied to Cohesive Soil in Vietnam. Appl. Sci.2024, 14, 1283.
Chau, T.-L.; Nguyen, T.-H.; Pham, V.-N. Physical and Numerical Models of Mechanically Stabilized Earth Walls Using Self-Fabricated Steel Reinforcement Grids Applied to Cohesive Soil in Vietnam. Appl. Sci. 2024, 14, 1283.
Abstract
The study examines the behavior of the Mechanically Stabilized Earth (MSE) wall using available reinforcement materials in Danang, Vietnam. The MSE was reinforced by the self-fabricated galvanized steel grids using CB300V steel with 3 cm ribs. The backfill soil is a sandy clay soil from the local area with a low cohesion. A full-scale model with full instrumentation was installed to investigate the distribution of tensile forces along the reinforcement layers. The highest load that caused the wall to collapse due to internal instability (reinforcement rupture) was 302 kN/m2, which is 15 times the design load of 20 kN/m2. The failure surface within the reinforced soil had a parabolic sliding shape which is similar to the theoretical studies. At the failure load level, the maximum lateral displacement at the top of the wall facing was small (3.9 mm) which is significantly lower than the allowable displacements for the retaining wall. Furthermore, a numerical model using FLAC software was applied to simulate the performance of the MSE wall. The modeling results are in good agreement with the physical model. Thus, the self-fabricated galvanized steel grids could be confidentially used in combination with the local backfill soil for the MSE walls.
Keywords
MSE wall; self-fabricated steel reinforcement grids; tensile forces; lateral displacement of the wall facing; failure surface; full-scale model; numerical model
Subject
Engineering, Civil Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
