Temperature distributions in reinforced soil retaining walls

Murray, R.; Farrar, D M

doi:10.1016/0266-1144(88)90017-9

Cited by 23 publications

(9 citation statements)

References 5 publications

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“…This result was reasonable and similar to previous research results [36,37]. It indicated that the experimental results from this full-scale The distribution of the tensile force in the reinforcement layers from this study was similar to the reports of Schlosser [33], Wichter et al [34], Murray and Farrar [7], Chau et al [35], and Chau and Nguyen [28] as well as design procedures [12-14]. However, the steel ribs included in the reinforcement grids caused a step in the tensile force distribution curve in front of and behind the ribs.…”

Section: Tensile Forces In the Reinforcement Barssupporting

confidence: 93%

“…The failure surface of the wall aligned with the horizontal direction at an angle of (45 • + φ/2) at the toe of the wall [10]. Currently, according to the design rules and standards [12-14], the failure surface of an MSE wall closely resembles the failure surfaces observed in the studies [2,7,8,10,11].…”

Section: Introductionmentioning

confidence: 79%

“…The mechanical behavior of MSE walls has been investigated using physical models by several researchers such as Murray and Farrar [7], Chang et al [2], Lee et al [8], Richards et al [9], and Ahmadi et al [10]. These studies found that the failure surface of the wall had a parabolic shape, passing through locations with the highest tensile forces within the reinforcement layers [2,7,8,10,11]. The failure surface of the wall aligned with the horizontal direction at an angle of (45 • + φ/2) at the toe of the wall [10].…”

Section: Introductionmentioning

confidence: 99%

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Physical and Numerical Models of Mechanically Stabilized Earth Walls Using Self-Fabricated Steel Reinforcement Grids Applied to Cohesive Soil in Vietnam

Chau,

Nguyen,

Pham

2024

Applied Sciences

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Mechanically stabilized earth (MSE) walls have been widely applied in construction to maintain the stability of high embankments. In Vietnam, imported reinforcement materials are expensive; thus, finding locally available materials for MSE walls is beneficial. This study examines the behavior of an MSE wall using local reinforcement materials in Danang, Vietnam. The MSE was reinforced by self-fabricated galvanized steel grids using CB300V steel with 3 cm ribs. The backfill soil was 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 greater than the design load of 20 kN/m2. The failure surface within the reinforced soil had a parabolic sliding shape that was 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), significantly lower than the allowable displacement for a retaining wall. Furthermore, a numerical model using FLAC software 7.0 was applied to simulate the performance of the MSE wall. The modeling results were in good agreement with the physical model. Thus, self-fabricated galvanized steel grids could confidently be used in combination with the local backfill soil for MSE walls.

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Section: Tensile Forces In the Reinforcement Barssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

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Physical and Numerical Models of Mechanically Stabilized Earth Walls Using Self-Fabricated Steel Reinforcement Grids Applied to Cohesive Soil in Vietnam

Chau,

Nguyen,

Pham

2024

Applied Sciences

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“…Mô phỏng tường chắn đất có cốt ("cốt 3") và chuyển vị của tấm tường bằng phần mềm Flac 2D Chuyển vị của tường (Hình 10) tăng dần từ chân tường đến đỉnh tường, phù hợp với kết quả nghiên cứu trên mô hình thí nghiệm. Dạng biểu đồ phân bố lực kéo trên cốt (Hình 11) cũng phù hợp với kết quả nghiên cứu trên mô hình thí nghiệm (Hình 9) và các kết quả nghiên cứu của Murray và Farrar[27], Chau[5].…”

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Đánh giá tường chắn đất có cốt dùng cốt mạ kẽm tự chế tạo bằng mô hình thực nghiệm và mô phỏng có xem xét vật liệu đắp tại miền Trung Việt Nam

Linh¹,

Hà²,

Phụng³

2021

TCKHCNXD

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Hiện nay, khi xây dựng tường chắn đất có cốt ở Việt Nam thì đều phải sử dụng các loại cốt nhập từ các hãng của nước ngoài. Bài báo đề xuất sử dụng cốt thép thương mại mạ kẽm dùng cho tường chắn đất có cốt. Nghiên cứu chỉ ra rằng ổn định nội bộ của tường chắn đất có cốt phụ thuộc nhiều vào tương tác đất-cốt và môi trường. Tương tác đất-cốt phụ thuộc chủ yếu vào tính chất cơ-lý (độ ẩm, thành phần hạt) và hình dạng của cốt, tuổi thọ của cốt phụ thuộc chủ yếu vào hóa tính (trở kháng, pH, Cl-, SO42-) của vật liệu đắp và môi trường. Các yếu tố cơ-lý-hóa chính của vật liệu đắp của 75 mỏ thu thập tại Miền Trung và cốt được thí nghiệm theo các tiêu chuẩn hiện hành để lựa chọn ra mỏ vật liệu đắp phù hợp cho tường chắn đất sử dụng cốt thép mạ kẽm. Mô hình thực nghiệm tỉ lệ 1/1 mô phỏng ứng xử của tường và từ đó dự báo thời gian phục vụ của tường chắn dưới tác động xâm thực của môi trường.

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“…Frost load in a cold climate region may cause serious damage to retaining walls (1)(2)(3)(4)(5)(6). When the frost susceptible soil (such as silty soil or clayey soil) behind and beneath the retaining wall is saturated and undrained, the water in the soil will migrate and change into ice in a cold climate.…”

mentioning

confidence: 99%

Microstructure-Based Random Finite Element Method Model for Freezing Effects in Soils and Cold Region Retaining Walls

Dong

2020

Transportation Research Record: Journal of the Transportation R

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This paper describes the development of a random finite element model that allows holistic simulation of the phase transition and consequent development of internal stress and volume changes in frozen soils. The simulation capabilities of the model are first validated with laboratory scale experiments. The validated model is then implemented to study the soil lateral stress on the retaining wall subjected to frost action. The results show that the frost action leads to an increase of lateral stresses along the retaining wall. Strategies to mitigate the frost loads on the retaining wall are analyzed with this model; drainage of water in the backfill and use of thermal insulation layer both help to mitigate the lateral frost loads. Overall, by accounting for the spatial nonhomogeneity and coupled thermo-mechanical responses in frozen soils, the model provides holistic simulation of the responses of retaining walls subjected to freezing conditions.

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Temperature distributions in reinforced soil retaining walls

Cited by 23 publications

References 5 publications

Physical and Numerical Models of Mechanically Stabilized Earth Walls Using Self-Fabricated Steel Reinforcement Grids Applied to Cohesive Soil in Vietnam

Physical and Numerical Models of Mechanically Stabilized Earth Walls Using Self-Fabricated Steel Reinforcement Grids Applied to Cohesive Soil in Vietnam

Đánh giá tường chắn đất có cốt dùng cốt mạ kẽm tự chế tạo bằng mô hình thực nghiệm và mô phỏng có xem xét vật liệu đắp tại miền Trung Việt Nam

Microstructure-Based Random Finite Element Method Model for Freezing Effects in Soils and Cold Region Retaining Walls

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