Experimental Investigation of Root Tensile Strength for Slope Stabilization

Capilleri, P.; Cuomo, Massimo; Motta, E.; Todaro, M. T.

doi:10.1007/s40098-019-00394-2

Cited by 15 publications

(5 citation statements)

References 30 publications

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“…ere are many kinds of herbaceous plants, the shallow soil has a large root-containing rate, and the root system mainly has a reinforcing effect [32]. e root-soil composite sample was obtained by ring knife sampling, and its root content and shear strength were determined.…”

Section: Materials Parametersmentioning

confidence: 99%

Stability Analysis of Ecological Slopes Based on a 3D Finite Element Model

Sui

Yuan

et al. 2021

Advances in Materials Science and Engineering

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To explore the effect of grass and shrub plant roots on the stability of soil slopes in rainy areas in the south, this article relies on the Longlang Expressway construction project. Cynodon dactylon and Magnolia multiflora were selected as research subjects. The plant distribution characteristics and mechanical properties are analyzed. This paper uses ABAQUS finite element software to construct a 3D model of the planted slope in the test section. The stress and strain on the root system and the soil were observed, and the variation law of slope stability before and after plant protection under different rainfall events was compared and analyzed. The test and simulation results show that the root content of Cynodon dactylon gradually decreases with increasing depth. Cynodon dactylon was mainly distributed in the 0–30 cm soil body, and its effect on improving the cohesion of the soil body reached 75%. Magnolia multiflora belongs to vertical roots and has a strong and longer main root with relatively developed lateral roots. Its root system passes through the sliding surface of the slope bottom, which reduces the maximum equivalent plastic stress generated inside the slope by 61%. When the total rainfall duration is unchanged, under the three rainfall intensities of small, medium, and large, herbaceous plants increase the safety factor of the soil by 1.33%, 2.08%, and 6.1%, respectively, and the roots of shrubs increase the safety factor of the soil by 3.29%, 4.08%, and 4.32%, respectively. When the rainfall intensity does not change, as the rainfall time increases, the effect of plants on the slope safety factor first gradually increases and eventually stabilizes. The research results provide a reliable theoretical basis for analyzing the effect of plant roots on soil consolidation and slope protection, and they also lay a technical foundation for the promotion and application of ecological slope protection technology.

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Section: Materials Parametersmentioning

confidence: 99%

Stability Analysis of Ecological Slopes Based on a 3D Finite Element Model

Sui

Yuan

et al. 2021

Advances in Materials Science and Engineering

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“…As a biological material, the root system’s plasticity causes displacement or deformation along the dynamic direction, mainly influenced by the tensile force 5 . Therefore, the tensile property of the root system is crucial to studying plant consolidation and erosion resistance and enhancing slope stability 6 .…”

Section: Introductionmentioning

confidence: 99%

Cyclic loading changes the taproot's tensile properties and reinforces the soil via the shrub's taproot in semi-arid areas, China

Hu,

Zhang,

Yan

et al. 2024

Sci Rep

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This study aimed to reveal the soil reinforcement by shrub root systems after repeated stress from external forces, such as high winds and runoff, for extended periods in the wind-hydraulic compound erosion zone. Using the widely distributed Shandong mine area soil and water-conserving plant species, Caragana microphylla, Hippophae rhamnoides, and Artemisia ordosica, cyclic loading tests were conducted on taproots of the three plant species (1–5 mm diameter) via a TY8000 servo-type machine to investigate the taproots’ tensile properties response to repeated loading–unloading using simulated high wind pulling and runoff scouring. Our study revealed that the tensile force was positively correlated with the root diameter but the tensile strength was negatively correlated under monotonic and cyclic loading of the three plants’ taproots. However, after cyclic loading, the three plant species' taproots significantly enhanced the tensile force and strength more than monotonic loading (P < 0.05). The taproot force–displacement hysteresis curves of the three plant species revealed obvious cyclic characteristics. Structural equation modeling analysis revealed that root diameter and damage method directly affected the taproots' survival rate, reflecting their sustainable soil reinforcement capacity. The damage method significantly influenced the soil reinforcement more than the root diameter. Our findings reveal that the plant species' taproots can adapt more to the external environment and enhance their resistance to erosion after natural low perimeter erosion damage, effectively inducing soil reinforcement. Particularly, the taproots of Caragana microphylla have superior soil-fixing ability and can be used for ecological restoration.

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“…Vegetative slope protection methods primarily achieve stabilization through the mechanical soil reinforcement effects of root systems and the hydrological soil reinforcement effects of vegetation. The former mainly includes deep root anchoring and shallow root reinforcement, while the latter primarily involves reducing pore pressure, mitigating splash erosion, and controlling runoff [7][8][9]. There has been considerable research on the mechanical soil reinforcement effects of root systems.…”

Section: Introductionmentioning

confidence: 99%

Integrating Root Morphology Based on Whole-Pullout Test of Model Roots: A Case Study

Zhai,

Zhang,

Zhang

et al. 2024

Applied Sciences

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To investigate the sensitivity and significance of different morphological characteristics of plant root systems on vertical pullout resistance, this study considered four main influencing factors: the number of lateral roots, taproot length, the branching angle of the lateral root, and the unit weight of the soil around the root. PC plastic model roots were employed to conduct a vertical pullout orthogonal experiment. A comprehensive μX theoretical analysis method based on the whole root system pullout test was applied for a stress analysis on root segments. Based on the results, the factors affected the vertical pullout resistance of plant root systems in the order of number of lateral roots > taproot length > unit weight of soil around the root > branching angle of the lateral root. When the number of lateral roots increased from 2 to 3, the vertical pullout resistance increased by 64%. Also, when the taproot length increased from 50 to 60 cm, the vertical pullout resistance increased by up to 46%. Furthermore, the unit weight of soil around the roots had a positive linear correlation with vertical pullout resistance. Based on the results, the number of lateral roots and the taproot length were the primary factors affecting the magnitude of the root system’s vertical pullout resistance. When selecting plants for slope protection, plant types with a larger number of lateral roots and longer taproots should be considered as the two most significant factors for achieving a better slope protection methodology.

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Experimental Investigation of Root Tensile Strength for Slope Stabilization

Cited by 15 publications

References 30 publications

Stability Analysis of Ecological Slopes Based on a 3D Finite Element Model

Stability Analysis of Ecological Slopes Based on a 3D Finite Element Model

Cyclic loading changes the taproot's tensile properties and reinforces the soil via the shrub's taproot in semi-arid areas, China

Integrating Root Morphology Based on Whole-Pullout Test of Model Roots: A Case Study

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