An experimental study on the pullout mechanical property of tortuous roots manufactured from 3D printing

DING Yu; PENG Boshi; XIA Zhenyao; LIU Zhenxian; LIU Chuxin

doi:10.16030/j.cnki.issn.1000-3665.202212045

2024 Vol. 51, No. 1

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DING Yu, PENG Boshi, XIA Zhenyao, LIU Zhenxian, LIU Chuxin. An experimental study on the pullout mechanical property of tortuous roots manufactured from 3D printing[J]. Hydrogeology & Engineering Geology, 2024, 51(1): 82-90. doi: 10.16030/j.cnki.issn.1000-3665.202212045

Citation:

DING Yu, PENG Boshi, XIA Zhenyao, LIU Zhenxian, LIU Chuxin. An experimental study on the pullout mechanical property of tortuous roots manufactured from 3D printing[J]. Hydrogeology & Engineering Geology, 2024, 51(1): 82-90. doi: 10.16030/j.cnki.issn.1000-3665.202212045

An experimental study on the pullout mechanical property of tortuous roots manufactured from 3D printing

1.
Key Laboratory of Geological Hazards on Three Gorges Reservoir Area （China Three Gorges University）, Ministry of Education, Yichang, Hubei　443002, China
2.
Hubei Key Laboratory of Disaster Prevention and Mitigation, Yichang, Hubei　443002, China

Received Date: 30 December 2022

Revised Date: 13 February 2023

Publish Date: 15 January 2024

Abstract

Abstract

Natural roots systems exhibit various tortuous morphologies, which significantly impact the root-soil interaction characteristics. Previous studies often treated root systems as straight, neglecting the deformation characteristics and failure modes of tortuous root systems under tensile loads. In this study, tensile test and pullout test are conducted by using tortuous roots manufactured from 3D printing technology with three different root diameters (2.0, 3.5 and 5.0 mm) and five root tortuosity (1.00, 1.05, 1.10, 1.15, 1.20), and the pullout behaviours of tortuous roots are explored. The results indicate that the tensile properties of root systems are influenced by both the tortuous structure and the material properties. The ultimate tensile force and tensile stiffness decreases with increasing tortuosity but increase with increasing diameter. The peak pull-out force of the root system initially increases and then decreases with tortuosity, reaching a maximum value when tortuosity is equal to 1.15. The peak pull-out displacement shows a similar trend. The tortuous root system forms an engaging effect with the soil by compressing the soil ribs, enhancing the interaction between roots and soil. The tensile force and stiffness of the tortuous fine root system are low, making it more prone to coordinate deformation with the soil to bear tensile loads. The deformation under stress of tortuous root systems differs significantly from that of straight root systems. This study provides theoretical references for the evaluation of soil-reinforcement by root system.
- 3D printing /
- tortuous root /
- pullout test /
- root-soil interaction /
- peak pullout force

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References

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