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Experimental Evaluation of the Effects of Structural Parameters, Installation Methods and Soil Density on the Micropile Bearing Capacity

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Abstract

Recognition of the behaviour of micropiles under the influence of various parameters can help in the most efficient and optimal use of this improvement instrument. The present research conducted multiple static strain-control loading tests with a displacement rate of 10 mm/min and a laboratory program using a large-scale physical modelling device to evaluate various parameters such as the length, diameter, bond radius, and bond skin friction of micropiles in sandy soils with different relative densities. In addition, the load-bearing capacities of bored and driven micropiles were compared and the results demonstrated the effects of each parameter, as well as installation methods on the load-bearing capacity of the micropiles. The results show the significant role of the relative density parameter compared to other parameters in the values of the load-bearing capacity of the micropile. The results of the experiments further revealed that the diameter parameter has an average effect of about 12% more than the length parameter on load-bearing capacity values at different soil densities and the driven installation method can increase the load-bearing capacity up to a maximum of 84% compared to the bored method.

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References

  1. Sabatini P, Tanyu B, Armour T, Groneck P, Keely J (2005) FHWA- Micropile Design and Construction (Reference Manual for NHI Course 132078). National Highway Institute, Estados Unidos

    Google Scholar 

  2. Turan A, El Naggar MH and Hinchberger S (2008) Lateral behaviour of micro-pile groups under static and dynamic loads. Proceeding of the 4th Canadian Conference of Geohazards.

  3. Wang z, Mei G, Cai G and Yu X (2009) Dynamic finite element analysis of micropile foundation in subgrade. In: GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics.

  4. Isam S, Hassan A, Mhamed S (2012) 3D elastoplastic analysis of the seismic performance of inclined micropiles. Comput Geotech 39:1–7. https://doi.org/10.1016/j.compgeo.2011.08.006

    Article  Google Scholar 

  5. Choi C and Cho S (2010) Field verification study for micropile load capacity. In: 10th International Workshop on Micropiles, Washington D.C., United States.

  6. Moayed RZ, Naeini SA (2012) Improvement of loose sandy soil deposits using micropiles. KSCE J Civ Eng 16:334–340. https://doi.org/10.1007/s12205-012-1390-2

    Article  Google Scholar 

  7. Jang YE, Han JT (2017) Field study on axial bearing capacity and load transfer characteristic of waveform micropile. Can Geotech J 55:653–665. https://doi.org/10.1139/cgj-2017-0155

    Article  Google Scholar 

  8. Bayesteh H, Sabermahani M (2018) Full-scale field study on effect of grouting methods on bond strength of hollow-bar micropiles. J Geotech Geoenviron Eng 144(12):04018091

    Article  Google Scholar 

  9. Juran I, Benslimane A, Hanna S (2001) engineering analysis of dynamic behavior of micropile systems. Transp Res Rec 1772:91–106. https://doi.org/10.3141/1772-11

    Article  Google Scholar 

  10. Escoffier S (2012) Experimental study of the effect of inclined pile on the seismic behaviour of pile group. Soil Dyn Earthq Eng. https://doi.org/10.1016/j.soildyn.2012.06.007

    Article  Google Scholar 

  11. Esmaeili M, Nik MG, Khayyer F (2012) Experimental and numerical study of micropiles to reinforce high railway embankments. Int J Geomech 13:729–744. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000280

    Article  Google Scholar 

  12. Mashhoud HJ, Yin JH, Panah AK, Leung YF (2018) Shaking table test study on dynamic behaviour of micropiles in loose sand. Soil Dyn Earthq Eng 110:53–69. https://doi.org/10.1016/j.soildyn.2018.03.008

    Article  Google Scholar 

  13. Tsukada Y, Miura K, Tsubokawa Y, Otani Y, You GL (2006) Mechanism of bearing capacity of spread footings reinforced with micropiles. Soils Found 46:367–376. https://doi.org/10.3208/sandf.46.367

    Article  Google Scholar 

  14. Boeckmann AZ (2006) Load transfer in micropiles for slope stabilization from tests of large-scale physical models. PhD diss., University of Missouri-Columbia

  15. Matos R, Pinto P, Rebelo C, Veljkovic M, Simões Da Silva L (2018) Axial Monotonic and Cyclic Testing of Micropiles in Loose Sand. Geotech Test J. https://doi.org/10.1520/GTJ20160284

    Article  Google Scholar 

  16. Sharma B, Hussain Z (2019) Behaviour of batter micropiles subjected to vertical and lateral loading conditions. J Geosci Environ Prot 7:206–220. https://doi.org/10.4236/gep.2019.72014

    Article  Google Scholar 

  17. Hakimian S, Mosallanezhad M (2019) The comparison of laboratory tests and numerical analysis of pressure and tension bearing capacities of the new system of microbulb and micropile system on clay in Shiraz,Iran. J Appl Eng Sci 9(1):63–72

    Google Scholar 

  18. Hwang TH, Kim KH, Shin JH (2017) Effective installation of micropiles to enhance bearing capacity of micropiled raft. Soils Found 57(1):36–49

    Article  Google Scholar 

  19. Nusier OK, Alawneh AS, Abdullatit BM (2009) Small-scale micropiles to control heave on expansive clays. Proc Inst Civ Eng-Ground Improv 162(1):27–35

    Article  Google Scholar 

  20. ASTM (2007) D 422–63: Standard test method for particle-size analysis of soils. ASTM International, West Conshohocken

    Google Scholar 

  21. ASTM (2016) D 4254–16: Standard test methods for minimum index density and unit weight of soils and calculation of relative density. ASTM International, West Conshohocken

    Google Scholar 

  22. Presti DL, Pedroni S, Crippa V (1992) Maximum dry density of cohesionless soils by pluviation and by ASTM D 4253–83: a comparative study. Geotech Test J 15:180–189. https://doi.org/10.1520/GTJ10239J

    Article  Google Scholar 

  23. ASTM (2011) D 3080–03: Standard Test Method for Direct Shear Test of Soils Under Consolidated Drained Conditions. ASTM International, West Conshohocken

    Google Scholar 

  24. Poulos HG (1980) Some aspects of skin friction of piles in clay under cyclic loading. NASA STI/Recon Technical Report.

  25. https://ipm.ssaa.ir/Search-Invention Accessed 27 May 2020

  26. Kershaw K, Luna R (2018) Scale model investigation of the effect of vertical load on the lateral response of micropiles in sand. DFI J J Deep Found Inst 12(1):3–15

    Article  Google Scholar 

  27. Bruce DA, Cadden AW, Sabatini PJ (2005) Practical advice for foundation design—micropiles for structural support. In: Proceedings GeoFrontiers: contemporary issues in foundation engineering, ASCE, pp 1–25. https://doi.org/10.1061/40777(156)14

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The authors whose names are listed in the title page certify that they have NO affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations,knowledge or beliefs) in the subject matter or materials discussed in this manuscript.

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Correspondence to Mohsen Keramati.

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Moradi Moghaddam, H., Keramati, M., Ramesh, A. et al. Experimental Evaluation of the Effects of Structural Parameters, Installation Methods and Soil Density on the Micropile Bearing Capacity. Int J Civ Eng 19, 1313–1325 (2021). https://doi.org/10.1007/s40999-021-00629-5

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  • DOI: https://doi.org/10.1007/s40999-021-00629-5

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