Abstract
A multi-plate inclined plate anchor is a structural member designed to resist the pullout forces and overturning moments, in order to ensure the stability of structures on- and off-shore. The tensile load of a structure is resisted by the inclined multi-plate anchors using the many plates connected axially along the central shaft. The inclined multi-plate anchors would be capable of generating higher pullout capacity in comparison to the inclined single-plate anchors, for an embedment depth considered. This paper presents a detailed experimental study on the estimation of the ultimate pullout capacity of inclined circular multi-plate anchors embedded in the sand. The plate anchors are inclined at 22.5°, 45° and 67.5° to the horizontal. The pullout capacity of the inclined single-plate anchors was compared with the existing studies. The dimensionless breakout factors show the multi-plate anchor replacing the existing single-plate anchors efficiently. The paper provides a brief discussion on the scale effect, the effect of spacing, the effect of inclination of the anchors on the pullout capacity. The conclusions include (a) the increase in the pullout capacity of the inclined double-plate and inclined triple-plate anchors with the increase in the embedment ratio (b) the increase in the breakout factor of the multi-plate anchors with the increase in the angle of inclination and spacing between the plates.
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References
Balla A (1961) The resistance to breaking-out of mushroom foundations for pylons. Proc 5th Int Conf Soil Mech Found Eng Paris 1:569–576
Bhattacharya P, Kumar J (2014) Pullout capacity of inclined plate anchors embedded in sand. Can Geotech J 51:1365–1370
Choudhury D, Subbarao KS (2005) Seismic uplift capacity of inclined strip anchors. Can Geotech J 42:263–271
Das BM, Puri VK (1989) Holding capacity of inclined square plate anchors in clay. Soils Found 29(3):138–144
Das BM, Seeley GR (1975a) Passive resistance of inclined anchors in sand. J Geotech Eng 101(3):353–356
Das BM, Seeley GR (1975b) Inclined load resistance of anchors in sand. J Geotech Eng 101(9):995–998
Das BM, Shukla SK (2013) Earth Anchors, 2nd edn. J Ross Publishing Inc., USA
Dickin EA, Laman M (2007) Uplift resistance of the strip anchors in cohesionless soil. Adv Eng Softw 38(8–9):618–625
Fahmy AM, de Bruyn JR, Newson TA (2013) Numerical investigation of the inclined pullout behavior of anchors embedded in clay. Geotech Geol Eng 31:1525–1542
Geddes JD, Murray EJ (1991) Passive inclined anchorages in sand. J Geotech Eng 117(5):810–814
Ghaly A, Clemence SP (1998) Pullout performance of inclined helical screw anchors in sand. J Geotech Eng 124(7):617–627
Ghosh P (2010) Seismic uplift capacity of inclined strip anchors in sand using upper bound limit analysis. Geomech Geoeng 5(4):267–275
Goel S, Shalini, Patra, N. R. (2006) Break out resistance of inclined anchors in sand. Geotech Geol Eng 24:1511–1525
Hanna A, Foriero A, Ayadat T (2015) Pullout capacity of inclined shallow single anchor plate in sand. Indian Geotech J 45(1):110–120
Hao D, Wang D, O’Loughlin CD, Gaudin C (2019) Tensile monotonic capacity of helical anchors in sand: interaction between helices. Can Geotech J 56:1534–1543
Harvey RC, Burley E (1973) Behaviour of shallow inclined anchorages in cohesionless sand. Ground Eng 6(5):48–55
Ilamparuthi K, Dickin EA, Muthukrisnaiah K (2002) Experimental investigation of the uplift behaviour of circular plate anchors embedded in sand. Can Geotech J 39(3):648–664
IS 2720-Part-III (1980) Method of test for soils, Determination of specific gravity, section 2, Fine, medium and coarse grained soils. Indian Standard methods of test for soils. New Delhi: Bureau of Indian Standards, 1–8
IS 2720-Part-IV (1995) Method of test for soils, Grain size analysis. Indian Standard methods of test for soils. Bureau of Indian Standards, New Delhi, pp 1–38
IS 2720-Part-XIII (1992) Method of test for soils, Direct shear test. Indian Standard methods of test for soils. Bureau of Indian Standards, New Delhi, pp 1–13
IS 2720-Part-XIV (1995) Method of test for soils, Determination of density index (relative density) of cohesionless soils. Indian Standard methods of test for soils. Bureau of Indian Standards, New Delhi, pp 1–14
Jesmani M, Kamalzare M, Nazari M (2013) Numerical study of behaviour of anchor plates in clayey soils. Int J Geomech 13(5):502-513
Kumar J, Naskar T (2012) Vertical uplift capacity of a group of two coaxial anchors in a general c–φ soil. Can Geotech J 49:367–373
Kumar J, Rahaman O (2019) Vertical uplift resistance of horizontal plate anchors for eccentric and inclined loads. Can Geotech J 56:290–299
Larnach WJ (1972) The pull-out resistance of inclined anchors installed singly and in groups in sand. Ground Eng 5(4):14–17
Liu J, Liu M, Zhu Z (2012) Sand deformation around an uplift plate anchor. J Geotech Geoenviron Eng 138(6):728–737
Merifield RS, Lyamin AV, Sloan SW (2005) Stability of inclined strip anchors in purely cohesive soil. J Geotech Geoenviron Eng 6:792–799
Merifield R, Smith C (2010) The ultimate uplift capacity of multi-plate anchors in undrained clay. In: GeoShanghai international conference: soil behaviour and geo-micromechanics (GSP200), Shanghai, China, pp 74–79. https://doi.org/10.1061/41101(374)12
Merifield RS, Sloan SW, Lyamin AV (2003) The stability of inclined plate anchors in purely cohesive soil. Faculty of Engineering & Surveying Technical Reports, Report TR-2003-03, University of Southern Queensland, ISBN 1877078050:1–23
Sakai T, Tanaka T (1998) Scale effect of a shallow circular anchor in dense sand. Soils Found 38(2):93–99
Singh V, Maitra S, Chatterjee S (2017) Generalized Design Approach for Inclined Strip Anchors in Clay. Int J Geomech 17(6):04016148
Spagnoli G, Gavin, K (2015) Helical piles as a novel foundation system for offshore piled facilities. Society of Petroleum Engineers - Abu Dhabi International Petroleum Exhibition and Conference, ADIPEC
Tagaya K, Scott RF, Aboshi H (1988) Scale effect in anchor pullout test by centrifugal technique. Soils Found 28(3):1–12
Tilak VB, Samadhiya NK (2018a) Uplift capacities of inclined double-plate square anchors at shallow depths in sand. In: International conference on advances in construction materials and structures (ACMS-2018a), IIT Roorkee, Roorkee, Uttarakhand, India, pp 1–6
Tilak VB, Samadhiya NK (2018b) Uplift capacities of inclined double-plate circular anchors at shallow depths in sand. Indian Geotechnical Conference, Indian Institute of Science, Bangalore, Karnataka, India, pp 1–10
Tilak VB, Samadhiya NK (2020) Pullout capacity of inclined square double-plate anchors at shallow depths in sand. Second ASCE India Conference on Challenges of Resilient and Sustainable Infrastructure Development in Emerging Economies (CRSIDE2020), Kolkata, India, pp 1–7
Tsuha CHC, Aoki N, Rault G, Thorel L, Garnier J (2012) Evaluation of the efficiencies of helical anchor plates in sand by centrifuge model tests. Can Geotech J 49:1102–1114
Yu SB, Hambleton JP, Sloan SW (2014) Analysis of inclined strip anchors in sand based on the block set mechanism. Appl Mech Mater 553:422–427
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Tilak , V.B., Samadhiya, N.K. Pullout capacity of Circular Multi-plate Inclined Anchors in Sand: An Experimental Study. Geotech Geol Eng 41, 2427–2449 (2023). https://doi.org/10.1007/s10706-023-02407-7
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DOI: https://doi.org/10.1007/s10706-023-02407-7