Structural Engineering and Mechanics

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Study on grout-free smart ground anchor using electromagnetic induction

  • Hyun-Seok Lee (Department of Mechanical Engineering, Changwon National University) ;
  • Jong-Kyu Park (Department of Mechanical Engineering, Changwon National University) ;
  • Jung-Tae Kim (Graduate School of Advanced Defense Engineering, Changwon National University)
  • Received : 2022.12.02
  • Accepted : 2024.05.13
  • Published : 2024.06.25
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Abstract

This study proposes a ground anchor using electromagnetic induction and utilizes an extended structure using hinges and links and mounting and sensing using electromagnets. The aim is to secure the anchor force, excluding grout, and to secure various sensing capabilities, including ground behavior. We propose a design based on the drilling diameter of 150 mm, and the materials used were STS304 and Aluminum 6061-T6. Computerized analysis was performed to confirm structural safety and functional implementation. The pull-out experiment was conducted by simulating the bedrock environment on a model earthwork as an experiment to check whether anchor force was generated by the insertion and tension of the anchor. The environmental pollution of grout, the difficulty of removing strands, and the inability to check whether the anchor is seated, which were pointed out as disadvantages of the existing ground anchor, were solved. Therefore, this study suggest that it can be effectively utilized as a secure and monitored anchoring solution in eco-friendly construction practices, including the installation of landslide prevention barriers.

Keywords

Acknowledgement

This research was supported by "Regional Innovation Strategy (RIS)" through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE) (2021RIS-003).

References

  1. Coates, D.F. and Yu, Y.S. (1970), "Three-dimensional stress distributions around a cylindrical hole and anchor", 2nd ISRM Congress, Belgrade, Yugoslavia, September.
  2. Dang, C.N., Marti-Vargas, J.R. and Hale, W.M. (2020), "Bond mechanism of 18-mm prestressing strands: New insights and design applications", Struct. Eng. Mech., 76(1), 67-81. https://doi.org/10.12989/sem.2020.76.1.067.
  3. Ebrahimi, F., Hosseini, S.H.S. and Selvamani, R. (2020), "Thermo-electro-elastic nonlinear stability analysis of viscoelastic double-piezo nanoplates under magnetic field", Struct. Eng. Mech., 73(5), 565-584. https://doi.org/10.12989/sem.2020.73.5.565.
  4. Georgiou, A.V. and Pantazopoulou, S.J. (2019), "Experimental and analytical investigation of the shear behavior of strain hardening cementitious composites", Struct. Eng. Mech., 72(1), 19-30. https://doi.org/10.12989/sem.2019.72.1.019.
  5. Hwang, H.S. (2015), "An experimental study on the pull-out resistance characteristics of acupressure type permanent anchors", Research Report No. 67, Seoul National University of Science and Technology, Seoul.
  6. Kim, C.U., Jeong, U.G., Jeon, W.B., Lee, J.G., Kim, G.H., Kim, N.Y. and Han C.U. (2022), "Cut slope design and construction example of panel anchor retaining wall considering fracture zone ground characteristics", Geotech. Eng., 38(4), 37-53.
  7. Kim, S.R., Choo, Y.W. and Kim, D.S. (2016), "Pullout capacity of horizontally loaded suction anchor installed in silty sand", Marine Georesour. Geotechnol., 34(1), 87-95. https://doi.org/10.1080/1064119X.2014.961622.
  8. Kim, Y.S., Lee, C.J. and Sung, H.J. (2013), "Evaluation of relationship between tensile force of anchor and safety factor of slope through numerical analysis", J. Korean Soc. Hazard Mitig., 13(5), 103-109. https://doi.org/10.9798/kosham.2013.13.5.103.
  9. Lee, S.H. and Sohn, S.H. (2017), "Analysis of the motion of a pendulum by using Faraday's law of electromagnetic induction", New Phys.: Sae Mulli, 67(3), 388-397. https://doi.org/10.3938/npsm.67.388.
  10. Lim, E.M., Huh, N.S., Shim, H.J., Oh, C.K. and Kim, H.S. (2013), "Structural integrity assessment of high-strength anchor bolt in nuclear power plant based on fracture mechanics concept", Trans. Korean Soc. Mech. Eng. A, 37(7), 875-881. https://doi.org/10.3795/KSME-A.2013.37.7.875.
  11. Lim, J.C., Lee, T.H. and Hong, S.W. (2000), "A study on compressive force of reinforced grout at the fixed head of compression anchor", J. Korean Geotech. Soc., 16(5) 213-226.
  12. Min, K.N., Lee, J.W., Lee, J.G. and Jeong, C.M. (2014), "A study for the applicable bearing-resistance of bearing anchor in the enlarged-borehole", J. Eng. Geol., 24(2), 261-271. https://doi.org/10.9720/kseg.2014.2.261.
  13. Park, H.S., Nguyen, D.D. and Lee, T.H. (2017), "Effect of high-frequency ground motions on the response of npp components: A state-of-the-art review", J. Korean Soc. Hazard Mitig., 17(6), 285-294. https://doi.org/10.9798/KOSHAM.2017.17.6.285.
  14. Park, S.K., Lee, S.J. and Hong, K.S. (2004), "Boundary control of an axially moving nonlinear tensioned elastic string", Trans. Korean Soc. Mech. Eng. A, 28(1), 11-21. https://doi.org/10.3795/KSME-A.2004.28.1.011.
  15. Seong, H.J., Kim, J.M., Kim, Y.S. and Park, G.H. (2012), "Temperature compensation of optical FBG sensors embedded tendon for long-term monitoring of tension force of ground anchor", J. Korean Geotech. Soc., 28(5), 13-25. https://doi.org/10.7843/kgs.2012.28.5.13.
  16. Shin, Y.S. (2011), "The problem of piling balls and anchor balls", Research Report No. 136, Wontech, Seoul.
  17. Su, M., Dai, G. and Peng, H. (2020), "Bond-slip constitutive model of concrete to cement-asphalt mortar interface for slab track structure", Struct. Eng. Mech., 74(5), 589-600. https://doi.org/10.12989/sem.2020.74.5.589.
  18. Water, R.K. (2018), "Optimization of ground development for deep thick soft ground", Korea Water Resources Corporation.
  19. Woo, B.C., Kim, S.S., Kim, B.G. and Suh, C.M. (2001), "Characteristic of fatigue properties with tension and bending loading using high strength steel wire", Trans. Korean Soc. Mech. Eng. A, 25(1), 161-167. https://doi.org/10.22634/KSMEA.2001.25.1.161.
  20. Yoo, N.J., Park, C.D., Lee, J.Y., Park, B.S. and Hong, Y.G. (2006), "Experimental study for the structural stability of permanent anchor", J Korea Inst. Struct. Maint., 10(5), 87-98.
  21. Zhang, P., Qi, C., Fang, H. and Sun, X. (2020), "Bending and free vibration analysis of laminated piezoelectric composite plates", Struct. Eng. Mech., 75(6), 747-770. https://doi.org/10.12989/sem.2020.75.6.747.