Shallow Layer Destruction Law of Expansive Soil Slope under Rainfall and the Application of Geogrid Reinforcement

Chen, Guan-yi; He, Peng; Wang, Gang; Sun, Shangqu; Xiao, Jie

doi:10.1155/2021/6636894

Cited by 8 publications

(4 citation statements)

References 28 publications

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“…Geogrid reinforcement is an example of a flexible limitation measure, which can inhibit the displacement generated by moisture absorption of expansive soil slopes and allow a moderate amount of deformation [127,128]. Small geogrid mesh sizes are recommended, providing better slope reinforcement [129]. Some scholars have used geo-cells flexible retaining walls to effectively limit swelling-shrinkage deformation of expansive soil slopes [130].…”

Section: Limitation Of Swelling-shrinkage Deformationmentioning

confidence: 99%

Failure Mechanisms and Protection Measures for Expansive Soil Slopes: A Review

Luo,

2024

Sustainability

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Due to the significant hydrophilicity and cracking properties of expansive soils, expansive soil slopes are prone to destabilization and landslides after rainfall, seriously threatening the safety of buildings, highways, and railroads. Substantial economic losses often accompany the occurrence of expansive soil slope disasters; thus, it is of great significance to understand the slope failure mechanisms experienced by expansive soil slopes and to prevent expansive soil slope disasters. In this paper, the current research status of the landslide failure mechanism of expansive soil slopes is systematically reviewed based on three research methods: field test, model test, and numerical simulation. The failure mechanisms of expansive soil slopes and the main influencing factors are summarized. Based on the failure mechanisms, three protection principles (waterproofing and water blocking, swelling–shrinkage deformation limitation, and crack inhibition and strength enhancement) that can be followed for disaster prevention of expansive soil slopes are proposed. The research status and advantages and disadvantages of these protection methods are reviewed, and future researchable directions of the stability of expansive soil slopes and slope protection methods are explored. Based on the previous work, a new flexible ecological slope protection system with a double waterproof layer is proposed for expansive soil slopes to realize ecological, efficient, and long-term protection. This paper thus aims to provide technical reference for the prevention and control of slope engineering disasters in expansive soil areas.

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Section: Limitation Of Swelling-shrinkage Deformationmentioning

confidence: 99%

Failure Mechanisms and Protection Measures for Expansive Soil Slopes: A Review

Luo,

2024

Sustainability

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“…In order to reduce the occurrence of expansive soil slope disasters, geogrid reinforcement, a technology of "soft swelling", is widely used in engineering. Moreover its technical effectiveness, economic and environmental protection have been proved and verified by a large number of practices [3][4][5][6][7][8] . Research on this block mainly focuses on mechanics, while the research on cracks is rarely found, so it is necessary to study.…”

Section: And Wang Guiyaomentioning

confidence: 99%

Influence of reinforcement method on the crack characteristic parameters of expansive soil experimental study

Liu

Huang

Wang

2023

Sci Rep

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The expansive soil slope is mainly characterized by the decline of slope integrity caused by shallow expansive soil cracking and the destruction of internal soil structure, which seriously affects the overall stability of expansive soil slope. To study the effect of the combination of geogrid reinforcement and slope vegetation on inhibiting the development of expansive soil cracks, six groups of test models were made. The natural dry–wet cycle was simulated, and the crack image was binarized by using image processing technology. The crack characteristic parameters such as crack ratio, crack width, and crack length were extracted, and the effect of various reinforcement methods on inhibiting the development of cracks was comprehensively evaluated. The basic situation of the development of crack indexes in each group with the development of multiple dry–wet cycles was obtained, and the fluctuation changes of crack indexes in different stages were different under different reinforcement methods and dry–wet cycles. At the same time, the influence of different reinforcement methods on the crack development of expansive soil is obtained. It is considered that planting vetiver grass + geogrid backpacking has a good effect on inhibiting the crack development of expansive soil.

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“…It is important to note that the geogrid reinforcement spacing exerts a notable influence on the stability of expansive soil slopes. e smaller the reinforcement spacing is, the higher the slope stability [82].…”

Section: Flexible Supportmentioning

confidence: 99%

Expansive Soil Embankment Filling and Cutting Treatment Technology: A Systematic Review

Huang

Shi

Zhang

et al. 2022

Advances in Materials Science and Engineering

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The characteristics of expansive soil, including over consolidation, swelling-shrinkage, fissures, and strength attenuation, can cause potential hazards in road construction, which are mainly manifested as subgrade swelling-shrinkage deformation and slope collapse. Effective treatment can not only ensure long-term subgrade stability but also reduce investment costs and environmental impact. In this review, the current development status of embankment filling and cutting slope treatment technology in expansive soil areas were summarized, and the classification standards of expansive soil filler, moisture retention, and antiseepage technology were described. Then, the utility of chemical, physical, biological, and solid waste modification materials in improving the engineering characteristics of core-filled expansive soil was discussed, and the cost and technical characteristics of these modification technologies were compared and analysed. Next, the application of rigid and flexible support technology in the treatment of cutting slope collapse was analysed, and the advantages and disadvantages of rigid and flexible supports were summarized. Finally, the development direction of expansive soil subgrade treatment technology was discussed. This review includes a summary of the treatment methods of highway subgrade in expansive soil areas and can provide a technical reference for treatment methods of expansive soil subgrade.

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Shallow Layer Destruction Law of Expansive Soil Slope under Rainfall and the Application of Geogrid Reinforcement

Cited by 8 publications

References 28 publications

Failure Mechanisms and Protection Measures for Expansive Soil Slopes: A Review

Failure Mechanisms and Protection Measures for Expansive Soil Slopes: A Review

Influence of reinforcement method on the crack characteristic parameters of expansive soil experimental study

Expansive Soil Embankment Filling and Cutting Treatment Technology: A Systematic Review

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