Field study of a new ecological slope protection method applied to expansive soil slope

Xu, Yingzi; Su, Chao; Zhu, Qiaosheng; Yang, Chunyan; Yang, Yunhe

doi:10.1007/s12517-021-09230-5

Cited by 6 publications

(5 citation statements)

References 33 publications

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“…Limitation of swelling-shrinkage deformation 1. Flexible limitation method (e.g., Geogrids [128], geo-cells [130], soilbags [115], ARVS [131,132]).…”

Section: Protection Principles Methods and Materials Effects Analysis...mentioning

confidence: 99%

“…The previously described soilbag stabilization method prevents rainwater infiltration and limits the lateral deformation of expansive soil [115]. Xu et al [131,132] proposed an anchor-reinforced vegetation system (ARVS) consisting of vegetation, anchors, and high-performance turf reinforcement mats (HPTRMs). The results indicated that this system effectively prevented large fluctuations in soil water content, restrained the swelling-shrinkage deformation of slopes (Figure 10), and provided superior slope protection [133].…”

Section: Limitation Of Swelling-shrinkage Deformationmentioning

confidence: 99%

“…The results indicated that this system effectively prevented large fluctuations in soil water content, restrained the swelling-shrinkage deformation of slopes (Figure 10), and provided superior slope protection [133]. The ARVS reinforcement system is shown in Figure 11 [132]. The replacement of expansive soils with non-expansive soils can effectively inhibit expansion and improve slope stability.…”

Section: Limitation Of Swelling-shrinkage Deformationmentioning

confidence: 99%

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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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“…Limitation of swelling-shrinkage deformation 1. Flexible limitation method (e.g., Geogrids [128], geo-cells [130], soilbags [115], ARVS [131,132]).…”

Section: Protection Principles Methods and Materials Effects Analysis...mentioning

confidence: 99%

Section: Limitation Of Swelling-shrinkage Deformationmentioning

confidence: 99%

Section: Limitation Of Swelling-shrinkage Deformationmentioning

confidence: 99%

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

Luo,

2024

Sustainability

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“…As a result, the maximum slope displacement gradually increases. The root systems of vegetation form a chain reaction with soil particles [30], which enhances the shear resistance of the surface soil, restraining the upward movement of the zone where shear strength decreases.…”

Section: Effect Of Reinforced Oleander Root System On Slope Displacementmentioning

confidence: 99%

The Impact of Vegetation Roots on Shallow Stability of Expansive Soil Slope under Rainfall Conditions

Wang,

Xu,

Wang

et al. 2023

Applied Sciences

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The impact of reinforcing vegetation roots on the stability of expansive soil slopes with moisture absorption and expansion was investigated. Then, poinsettia is selected as the slope protection plant, and ABAQUS software (version 2022) with secondary development is used to simulate the moisture absorption and expansion of the expansive soil slope. After that, the strength reduction method is employed to study the effects on the displacement and plastic zone, and on the shallow layer of the expansive soil slope at different rainfall conditions. The following points are revealed: (1) The roots of the poinsettia can reduce the displacement of the slope. But, when the rainfall intensity exceeds the soil permeability coefficient, the soil reinforcement effect decreases. (2) The poinsettia root system can alleviate the concentration of plastic strain, disperse the plastic zone, and increase slope stability along the distribution of the roots. (3) The poinsettia roots can improve the shallow stability of the slope. But when the rainfall intensity exceeds the surface permeability coefficient, the magnitude of the reinforcement decreases. The results demonstrate that the poinsettia roots can enhance shallow slope stability. However, with increasing rainfall intensity, the ability of the poinsettia roots to enhance shallow slope stability gradually weakens.

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“…Therefore, combining traditional slope protection techniques with ecological slope protection techniques can make up for the shortcomings of a single slope protection method. Xu et al used the anchor reinforced vegetation system for shallow protection of expansive soil slopes to effectively improve the soil and water conservation performance of the slope [16]. Su et al adopted the new slope protection method of bolt hinge anchor block and ecological vegetation coverage to effectively improve the slope stability [17].…”

Section: Introductionmentioning

confidence: 99%

Influence of Super Absorbent Polymer on Root Characteristics and Anchorage of Amorpha fruticosa on Rocky Slope

2022

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Super absorbent polymer (SAP), known as a water retention agent, has a high capacity for water absorption, which can help enhance the soil structure. This paper studied the effects of SAP dosages on the root characteristics and anchorage of Amorpha fruticosa on rock slopes. The internal relationship between root growth effect and soil was discussed, and a specific reference was provided for the rational application of SAP on slopes. Using the pull-out and tensile resistance tests, we systematically studied the changes of soil properties, root distribution, root tensile strength, and root anchorage under six different SAP dosages. The results indicated that: (1) With the increase in SAP dosage, the natural soil water content and water content after 24 h of watering increased significantly, whereas the contents of TN, TP, and TK decreased dramatically. (2) With the increase in SAP dosage, the amount and length of first-order and secondary lateral roots decreased significantly, and there was no significant difference in diameter. The amount of downslope first-order and unembedded secondary lateral roots is greater than upslope. The amount of upslope embedded secondary lateral roots is greater than in downslope. (3) Tensile strength: embedded secondary root > non-embedded secondary root > first-order lateral root; upslope root > downslope root. (4) With the increase in SAP dosage, the plant anchorage drops noticeably. This study concluded that the significant addition of SAP could enhance the tensile strength of upslope embedded secondary lateral roots but would adversely affect soil nutrients, root distribution, and root anchorage. The addition of SAP in this test had no significant effect on improving slope stability. From the perspective of reinforcement capacity, we cannot blindly pursue the survival rate and other high dosage use of water retention agents to increase the risk of slope destabilization.

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Field study of a new ecological slope protection method applied to expansive soil slope

Cited by 6 publications

References 33 publications

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

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

The Impact of Vegetation Roots on Shallow Stability of Expansive Soil Slope under Rainfall Conditions

Influence of Super Absorbent Polymer on Root Characteristics and Anchorage of Amorpha fruticosa on Rocky Slope

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