Abstract
Plate anchor is a commonly used foundation system designed to resist static and cyclic pullout loads from the superstructure. A short period of cyclic disturbance caused by wind, wave, or tide can reduce the ultimate pullout capacity of the anchor. In practical conditions, the post-cyclic pullout load resisted by the plate anchor is often lower due to the loss of undrained shear strength of soil after cyclic loading history. The geotextile reinforcement placed above the horizontal anchor plate strongly influences the anchor's ultimate static and cyclic pullout capacity, and addresses the post-cyclic shear strength degradation. This study presents the outcomes of a series of experimental tests on plate anchors embedded in reinforced and unreinforced soft clay. Strain-controlled monotonic and cyclic pullout tests are conducted on plate anchors buried at different embedment depths. The results indicate that the reinforced system displays a higher static and cyclic pullout capacity with lesser anchor displacement. Due to the superior cyclic resilience property of woven geotextile, the anchors embedded in reinforced soil exhibit a higher post-cyclic pullout resistance compared to the anchors in unreinforced soil.
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References
Das BM, Shukla SK (2013) Earth anchors, 2nd edn. J. Ross Publishing, Florida, USA
Meyerhof GG, Adams JI (1968) The ultimate uplift capacity of foundations. Can Geotech J 5(4):225–244. https://doi.org/10.1139/t68-024
Davie JR, Sutherland HB (1977) Uplift resistance of cohesive soils. J Geotech Eng Div ASCE 103(9):935–952. https://doi.org/10.1061/AJGEB6.0000491
Das BM (1978) Model tests for the uplift capacity of foundations in clay. Soils Found 18(2):17–24
Das BM (1980) A procedure for estimation of ultimate capacity of foundations in clay. Soils Found 20(1):77–82. https://doi.org/10.3208/sandf1972.20.77
Das BM, Puri VK (1989) Holding capacity of inclined square plate anchors in clay. Soils Found 29(3):138–144. https://doi.org/10.3208/sandf1972.29.3_138
Das BM, Singh G (1994) Uplift capacity of plate anchors in clay. In: Proceedings of the 4th international offshore and polar engineering conference, ISOPE, USA, vol I, pp 436–442
Singh SP, Tripathy DP, Ramaswamy SV (2007) Estimation of uplift capacity of rapidly loaded plate anchors in soft clay. Mar Georesour Geotechnol 25(3):237–249
Singh SP, Ramaswamy SV (2008) Effect of shape on holding capacity of plate anchors buried in soft soil. Geomech Geoeng 3(2):157–166. https://doi.org/10.1080/17486020802126875
Zhang N, Wu H, Shen JS, Hino T, Yin Z (2016) Evaluation of the uplift behaviour of plate anchor in structured marine clay. Mar Georesour Geotechnol 35(6):1–11. https://doi.org/10.1080/1064119X.2016.1240273
Su LJ, Chan TCF, Shiu YK, Cheung T, Yin JH (2007) Influence of degree of saturation on soil nail pull-out resistance in compacted completely decomposed granite fill. Can Geotech J 44(11):1314–1328. https://doi.org/10.1139/T07-056
Borana L, Yin JH, Singh DN, Shukla SK, Pei HF (2017) Influences of initial water content and roughness on skin friction of piles using FBG technique. Int J Geomech 17(4):04016097. https://doi.org/10.1061/(asce)gm.1943-5622.0000794
Hong CY, Zhang YF, Zhang YW, Borana L, Wang RF (2017) New LGFBG-based structural integrity evaluation method for cement-grouted soil nails. Int J Geomech 17(8):04017026. https://doi.org/10.1061/(asce)gm.1943-5622.0000910
Hong CY, Liu ZX, Zhang YF, Zhang MX, Borana L (2017) Influence of critical parameters on the peak pullout resistance of soil nails under different testing conditions. Int J Geosynth Ground Eng 3(2):1–7. https://doi.org/10.1007/s40891-017-0095-5
Su LJ, Chan TCF, Yin JH, Shiu YK, Chiu SL (2008) Influence of overburden pressure on soil–nail pullout resistance in a compacted fill. J Geotech Geoenviron Eng 134(9):1339–1347. https://doi.org/10.1061/(asce)1090-0241(2008)134:9(1339)
Yin JH, Zhou WH (2009) Influence of grouting pressure and overburden stress on the interface resistance of a soil nail. J Geotech Geoenviron Eng 135(9):1198–1208. https://doi.org/10.1061/(asce)gt.1943-5606.0000045
Merifield RS, Sloan SW, Yu HS (2001) Stability of plate anchors in undrained clay. Géotechnique 51(2):141–154. https://doi.org/10.1680/geot.2001.51.2.141
Merifield RS, Lyamin AV, Sloan SW, Yu HS (2003) Three dimensional lower bound solutions for the stability of plate anchors in clay. J Geotech Geoenviron Eng 129(3):243–253. https://doi.org/10.1061/(ASCE)1090-0241(2003)129:3(243)
Maitra S, White D, Chatterjee S, Choudhury D (2019) Numerical modelling of seepage and tension beneath plate anchors. Comput Geotech 108:131–142. https://doi.org/10.1016/j.compgeo.2018.12.022
Rowe RK, Davis EH (1982) The behaviour of anchor plates in clay. Géotechnique 32(1):9–23. https://doi.org/10.1680/geot.1982.32.1.9
Song Z, Hu Y, Randolph MF (2008) Numerical simulation of vertical pullout of plate anchors in clay. J Geotech Geoenviron Eng ASCE 134(6):866–875. https://doi.org/10.1061/(ASCE)1090-0241(2008)134:6(866)
Wang D, Hu Y, Randolph MF (2010) Three-dimensional large deformation finite-element analysis of plate anchors in uniform clay. J Geotech Geoenviron Eng ASCE 136(2):355–365
Yu L, Liu J, Kong XJ, Hu Y (2011) Numerical study on plate anchor stability in clay. Geotechnique 61(3):235–246. https://doi.org/10.1680/geot.8.P.071
Ponniah DA, Finlay TW (1983) Cyclic behaviour of plate anchors. Can Geotech J 25:374–381. https://doi.org/10.1139/t88-038
Rao SN, Prasad SN (1991) Behaviour of a helical anchor under vertical repetitive loading. Mar Geotechnol 10:203–228. https://doi.org/10.1080/10641199109379892
Singh SP, Ramaswamy SV (2008) Influence of frequency on the behaviour of plate anchors subjected to cyclic loading. Mar Georesour Geotechnol 26(1):36–50. https://doi.org/10.1080/10641190801952410
Singh SP, Ramaswamy SV (2010) Effects of cyclic frequency and pre-loading on behaviour of plate anchors. In: Proceedings of the GeoShanghai international conference 2010, deep foundations and geotechnical in situ testing, Shanghai, China, pp 252–260
Datta M, Gulhati SK, Achari G (1990) Behaviour of plate anchors in soft cohesive soils under cyclic loading. Indian Geotech J 20(3):206–224
Choudhury D, Rao KSS (2005) Seismic uplift capacity of inclined strip anchors. Can Geotech J 42(1):263–271. https://doi.org/10.1139/t04-074
Choudhury D, Rao KSS (2004) Seismic uplift capacity of strip anchors in soil. Geotech Geol Eng 22(1):59–72. https://doi.org/10.1023/B:GEGE.0000014003.69378.6a
Nandi R, Choudhury D (2021) Evaluation of passive earth resistance using an improved limit equilibrium method of slices. Int J Geomech 21(11):04021207. https://doi.org/10.1061/(ASCE)GM.1943-5622.0002183
Pain A, Choudhury D, Bhattacharyya SK (2016) Seismic uplift capacity of horizontal strip anchors using a modified pseudodynamic approach. Int J Geomech 16(1):04015025. https://doi.org/10.1061/(asce)gm.1943-5622.0000471
Rangari SM, Choudhury D, Dewaikar DM (2013) Seismic uplift capacity of shallow horizontal strip anchor under oblique load using pseudo-dynamic approach. Soils Found 53(5):692–707. https://doi.org/10.1016/j.sandf.2013.08.007
Rangari SM, Choudhury D, Dewaikar DM (2013) Estimation of seismic uplift capacity of horizontal strip anchors using pseudo-dynamic approach. KSCE J Civ Eng 17(5):989–1000. https://doi.org/10.1007/s12205-013-0046-1
Rangari SM, Choudhury D, Dewaikar DM (2013) Computations of seismic passive resistance and uplift capacity of horizontal strip anchors in sand. Geotech Geol Eng 31(2):569–580. https://doi.org/10.1007/s10706-012-9609-z
Yu L, Zhou Q, Liu J (2015) Experimental study on the stability of plate anchors in clay under cyclic loading. Theor Appl Mech Lett 5(2):93–96. https://doi.org/10.1016/j.taml.2015.02.005
Erken A, Ülker MBC (2008) The post cyclic shear strength of fine-grained soils. In: The 14th world conference on earthquake engineering, pp 12–17
Wang Y, Lei J, Gong X, Wang Y, Lia S, Yang P (2018) Post-cyclic undrained shear behaviour of marine silty clay under various loading conditions. Ocean Eng 158:152–161. https://doi.org/10.1016/j.oceaneng.2018.03.081
Nene AS, Garg S (1991) Behaviour of plate anchors in reinforced cohesive soils. Indian Geotech J 21(4):327–336
Krishnaswamy NR, Parashar SP (1994) Uplift behaviour of plate anchors with geosynthetics. Geotext Geomembr 13(2):67–89. https://doi.org/10.1016/0266-1144(94)90040-X
Saran S, Rao PP (2002) Uplift behaviour of horizontal plate anchors with geosynthetics. Indian Geotech J 32(2):329–338
Bhattacharya P, Bhowmik D, Mukherjee SP, Chattopadhyay BC (2008) Pullout behaviour of square anchors in reinforced clay. In: Proceedings of the 12th international conference of international association for computer methods and advances in geomechanics, vol 1, pp 3441–3447
Das TK, Chattopadhyay BC, Roy S (2013) Pullout capacity of plate anchors with coaxial geotextile reinforcement. Ann Pure Appl Math 5(1):53–63
Banerjee S, Nagaraju M (2017) Pullout behaviour of square anchor plates in reinforced soft clay. Int J Geosynth Ground Eng 3(3):25. https://doi.org/10.1007/s40891-017-0101-y
Ravichandran PT, Ilamparuthi K, Toufeeq MM (2008) Study on uplift behaviour of plate anchors under monotonic and cyclic loading in geo-grid reinforced sand bed. In: Proceedings of the 12th international conference of international association for computer methods and advances in geomechanics, vol 1, pp 3448–3455
Tafreshi SNM, Rahimi M, Dawson AR, Leshchinsky B (2018) Cyclic and post-cycling anchor response in geocell-reinforced sand. Can Geotech J 56:1700–1718. https://doi.org/10.1139/cgj-2018-0559
Biradar J, Banerjee S, Shankar R, Ghosh P, Mukherjee S, Fatahi B (2019) Response of square anchor plates embedded in reinforced soft clay subjected to cyclic loading. Geomech Eng 17(2):165–173. https://doi.org/10.12989/gae.2019.17.2.165
Wood DM (2004) Geotechnical modelling. Spon Press, Abingdon
Hegde A, Sitharam TG (2013) Experimental and numerical studies on footings supported on geocell reinforced sand and clay beds. Int J Geotech Eng 7(4):346–354. https://doi.org/10.1179/1938636213Z.00000000043
Viswanadham BVS, König D (2004) Studies on scaling and instrumentation of a geogrid. Geotext Geomembr 22(5):307–328. https://doi.org/10.1016/S0266-1144(03)00045-1
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This research was supported in part by the Department of Science and Technology, India, through the project funding [DST Sanction No: SB/S3/CEE/0023/2014]. The financial assistance from DST is gratefully acknowledged.
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RS: identification of the problem, methodology, development of experimental setup, conducted experiments, result interpretation, and draft preparation. SB: Conceptualization, methodology, supervision, evaluated the findings, and authorized the final manuscript. Sarvesh: preparation and execution of experiments. SM: initial plan and conceptualization.
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Ravishankar, S., Banerjee, S., Sarvesh et al. Static, Cyclic, and Post-cyclic Pullout Response of Horizontal Plate Anchors in Reinforced Soft Clay. Int. J. of Geosynth. and Ground Eng. 8, 37 (2022). https://doi.org/10.1007/s40891-022-00381-3
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DOI: https://doi.org/10.1007/s40891-022-00381-3